The strange ways animals have helped soldiers during wartime

Across centuries of conflict, animals have slipped into the margins of military history, performing tasks that ranged from ingenious to almost unbelievable. From glow-in-the-dark insects that lit up trenches to a 440-pound bear that hauled artillery shells, wartime ingenuity has repeatedly turned to the animal world for help when technology or manpower fell short.

These stories are more than curiosities. They reveal how soldiers under extreme pressure adapted to hostile environments by relying on animal senses, strength and even bioluminescence, while also forming bonds that softened the brutality of war.

Why armies turned to animals in the first place

Long before modern electronics, commanders needed mobility, communication and early warning systems that human bodies and machines could not always provide. Horses, dogs, pigeons and elephants became standard tools of warfare, and over time that practical reliance expanded into more unusual species. A research overview on animals in wardescribes how elephants carried archers, camels crossed deserts and dolphins later patrolled coasts, illustrating a long pattern of militaries recruiting whatever species fit the tactical need.

During the First World War, that improvisation reached an industrial scale. An entry on animals in the 1914 to 1918 conflict notes that millions of creatures were drawn into service and that birds, including canaries and songbirds, were used to detect gas and help distinguish between allied and enemy aircraft. A social history account of wartime veterinary work adds that animals were valued because they could undertake tasks that were difficult or impossible for humans, from hauling loads through mud to sensing threats in darkness, and that they also provided companionship that eased stress at the front.

One summary of wartime service explains that animals helped with transport, detection and morale, and even allowed soldiers to read maps in the dark by the faint light of biological organisms. A post on military veterinary work notes that during war time, animals were used by warring armies because of their unique ability to perform such tasks, and that animals also provided companionship and helped soldiers cope with fear, with some troops using small creatures in the dark to read maps and letters.

Glowworms as trench lanterns

Among the strangest adaptations came in the mud of the Western Front, where soldiers turned tiny bioluminescent insects into makeshift lanterns. The larvae known as glowworms emit a cold greenish light to attract prey. In peacetime that glow is a curiosity in caves and hedgerows; in the trenches it became a practical tool.

Reports on unusual war animals describe Allied soldiers during World War I collecting these insects in jars to create small lamps. One account of unexpected animals in combat notes that during World War I, glow worms were used as lamps for Allied soldiers who needed to read maps and orders without drawing enemy fire. The jars gave off enough light to make out lines and coordinates, yet were dim enough that snipers and artillery spotters were less likely to notice.

Another reference to wartime animal service explains that some troops literally read maps in the dark using small creatures, a detail that aligns with stories of glowworm lanterns in dugouts. For men who lived under constant threat from flares and shell bursts, the ability to consult a map or letter without striking a match meant one less risk. In that sense, the glowworm jars functioned as an early, organic version of low-light technology.

The practice also shows how front line soldiers improvised with whatever nature offered. Unlike horses or messenger pigeons, glowworms were not part of any formal program. They were scavenged from the environment and repurposed on the spot, a reminder that some of the most inventive wartime uses of animals began as ad hoc survival strategies rather than official doctrine.

Gas-detecting slugs and birds on the Western Front

Chemical weapons turned the First World War into a laboratory of desperate countermeasures, and animals again became sensors. A feature on heroic animals of the Great War describes how slugs were pressed into service as early warning devices. Under the title The Gas Detecting Slugs of the Western Front, it recounts that during the brutal fighting, these small creatures reacted to low levels of gas before humans could smell or feel anything, giving troops time to put on masks.

A museum essay that asks how animals, even slugs, served in the Great War echoes this theme. That piece explains that slugs and other animals were monitored in trenches because they showed signs of distress at gas concentrations that were still below the threshold for human detection. Commanders who noticed the slugs retracting or behaving oddly could sound an alarm seconds or minutes earlier than they otherwise would have, a tiny margin that could mean survival.

Birds also became part of the early warning network. The 1914 to 1918 encyclopedia entry on other birds notes that canaries and songbirds were used in trenches and tunnels to detect gas, since their small bodies succumbed quickly to toxins and their distress signaled danger. The same source mentions that birds helped observers tell apart allied and enemy aircraft, adding an aerial dimension to their role.

Together, these examples show how the sensory abilities and vulnerabilities of animals were turned into crude detection systems. Slugs and canaries could not understand the war around them, but their biology offered clues that human noses and lungs missed until it was too late.

Messenger pigeons and the legend of Cher Ami

While slugs and glowworms worked quietly, pigeons became some of the most celebrated animal participants in twentieth century warfare. Their homing ability allowed them to carry messages above trenches, forests and mountains when radio sets were bulky or unreliable. A museum feature on how animals served in the Great War highlights Pigeons as one of five key animal contributors and explains that they delivered dispatches under fire when telephone lines had been cut.

One of the most famous birds was Cher Ami, whose story appears in a collection of wartime animal accounts. In a list of six stories of animals that went to war, Cher Ami is described as a homing pigeon that carried a critical message to save surrounded troops despite being badly wounded. The same overview, accessible through an image link to wartime animal stories, credits Cher Ami with helping rescue nearly two hundred soldiers who had been mistakenly shelled by their own side.

The link that points to those stories, hosted on a page of animals who went, also recounts other pigeons that flew through storms, smoke and machine-gun fire. These birds carried tiny message tubes strapped to their legs, each one a fragile link between isolated units and headquarters.

Messenger pigeons illustrate how living creatures filled gaps in human technology. They were not as fast as radio, but they were often more resilient under bombardment, and they required no batteries or cables. Their service also left a cultural legacy, with memorials and medals awarded to birds that never understood the human conflicts they were drawn into.

Wojtek the soldier bear

If pigeons provided speed and slugs provided sensitivity, a Syrian brown bear named Wojtek provided sheer strength and morale. A museum post about wartime storytelling explains that the institution is featuring a book titled “Brothers in Arms: A True World War II Story of Wojtek the Bear and the Soldiers Who Loved Him” by Susan Hood, and notes that for his service, Wojtek was promoted from private to corporal, becoming the only bear in history to hold official rank.

According to the same account, Wojtek carried heavy artillery shells during the Italian campaign and marched with soldiers as part of a Polish unit. The description emphasizes that Wojtek, often called the soldier bear, was so integrated into the unit that his image, carrying a shell, became an emblem on their insignia. A link from the museum’s social media page explains that for his service, he was promoted from private to corporal, and that after the war his life of marching with soldiers came to a close in a zoo, where former comrades visited and spoke to him in their native Polish language.

Wojtek’s story also appears in broader surveys of wartime animals, which describe how he was adopted as a cub, fed condensed milk and fruit, and eventually learned to carry ammunition crates. Those accounts underscore how he served both as a working animal and as a mascot, lifting spirits in a unit that had endured deportation and brutal fighting. His official promotion symbolized the affection and respect the soldiers felt, even if the rank was largely ceremonial.

In contrast with anonymous pack animals, Wojtek became an individual character in wartime memory. His presence in postwar books and museum events shows how one animal’s story can stand in for the experiences of thousands of others that labored without names or recognition.

Sea lions, dolphins and underwater patrols

As warfare extended into oceans and harbors, militaries sought animals that could operate underwater with agility and precision. Modern marine programs have relied on dolphins and sea lions to detect mines, guard ships and recover equipment from the seabed. General reference material on Sea Lions describes these animals as intelligent, trainable marine mammals that can maneuver quickly in coastal waters, a profile that fits the needs of naval security teams.

Further background on sea lions highlights their keen vision and ability to dive repeatedly, traits that navies have used to locate mines and suspicious divers. A Business Insider feature on unbelievable instances of animals in the military explains that the United States Navy developed mine-hunting dolphins and trained marine mammals to detect and mark underwater explosives, describing them as more effective in some environments than human divers or mechanical sensors.

The same feature notes that the Navy began working with dolphins in 1960 and that official statements credited them with finding mines and guarding harbors. Another overview of ways animals have served the military explains that dolphins were used to locate mines and enemy swimmers, while sea lions were trained to attach clamps to the legs of intruders so that security teams could pull them to the surface.

These programs illustrate a modern version of the same logic that once sent pigeons into the sky and slugs into trenches. Where human senses and machines struggled, animals provided a living platform for detection and response, guided by trainers rather than by their own understanding of conflict.

Napalm bats and other failed experiments

Not every wartime animal project succeeded. Some ideas stretched the boundary between innovation and cruelty, and several never progressed beyond testing. A list of ten animals used for military purposes describes one of the most controversial examples under the heading Napalm bats. The concept involved attaching small incendiary devices to bats that would roost in enemy buildings, then igniting the charges to start widespread fires.

The same overview explains that this plan was tested with live bats fitted with timed explosives, and that some escaped during trials, causing unintended fires on the American side. The project was eventually abandoned, in part because of the risk and in part because other weapons, including atomic bombs, advanced more quickly.

Another survey of ways animals have served the military, written by Laura Moss and titled “10 Ways Animals Have Served the Military,” describes anti-tank dogs trained to run under enemy vehicles with explosives strapped to their backs. According to that account, the dogs often became confused on the battlefield, sometimes returning to their own lines or failing to distinguish between friendly and enemy tanks, which made the program both ineffective and ethically troubling.

These failed experiments reveal the darker side of wartime improvisation. Where glowworm jars and messenger pigeons adapted natural behavior to human needs with relatively low harm, schemes like napalm bats and explosive dogs treated animals as disposable delivery systems for weapons, drawing criticism even at the time.

Unusual mascots and companions in the ranks

Alongside working animals, soldiers adopted creatures as mascots and companions, blurring the line between tool and comrade. A scholarly chapter on wartime mascots notes that among the most common military mascots are dogs and horses, but that mascots ranged from hens to donkeys, badgers to sheep and even eagles on the battlefield. The same analysis explains that these animals often lived with units, marched in parades and appeared on insignia, providing a sense of identity and continuity.

In some cases, mascots became semi-official symbols, as Wojtek did for his Polish unit. Other times they were small comforts in harsh conditions. A video feature on the tragic tale of animals lost in wartime conflicts describes how services now honor military horses, dogs, donkeys and pigeons, recognizing not only their labor but also the emotional support they gave to troops who faced death daily.

Social history accounts of the First World War show that soldiers in trenches and camps kept cats to control rats, goats to provide milk and even monkeys or bears as curiosities. These animals might not have carried messages or detected mines, but they played a quieter role in sustaining morale. When letters from home were delayed and food was scarce, feeding and caring for a mascot gave soldiers a small routine of normal life.

Modern militaries still recognize this bond. Working dogs that serve in bomb detection or patrol roles often live with their handlers, and ceremonies mark their retirement or death. The long tradition of mascots and companions suggests that even in the most mechanized wars, humans seek out animal relationships as a buffer against isolation and fear.

From war elephants to modern doctrine

The use of glowworms and slugs might seem like a quirky footnote, but they sit on a long continuum that stretches back to war elephants and forward to digital-age doctrine. The research starter on elephants in battle explains that these massive animals carried archers and trampled enemy formations in ancient campaigns, while camels were used in deserts where horses struggled. That same overview notes that animals have been used as messengers, transport and even living shields across many cultures.

A Business Insider survey of nine unbelievable instances of animals in the military lists war elephants alongside pigeon-guided missiles and mine-hunting dolphins, and describes a 440-pound bear that served with soldiers, a clear reference to Wojtek. The juxtaposition of ancient elephants and twentieth century bears highlights how the basic idea of enlisting animals has persisted even as weapons and tactics changed.

Modern military research often frames animal use in terms of capabilities and ethics. Programs involving dolphins and sea lions are defended as life-saving tools that reduce risk to human divers, while critics question the welfare of the animals and the morality of putting them in harm’s way. Historical cases like napalm bats and anti-tank dogs are now widely cited as examples of what should not be repeated.

At the same time, the sensory talents that once made slugs and canaries valuable are now being replicated in technology. Chemical sensors, night-vision equipment and autonomous drones aim to provide the same early warning and reconnaissance without putting animals at risk. Yet the stories from earlier wars remain instructive, because they show how soldiers on the ground adapt quickly with whatever resources they have, rather than waiting for perfect tools.

Memory, commemoration and the cost to animals

In recent years, public memory has begun to catch up with the scale of animal involvement in war. A video report on the tragic tale of animals lost in wartime conflicts describes services that honor military horses, dogs, donkeys and pigeons on a national day for war animals. These ceremonies acknowledge that countless creatures suffered injury, exhaustion and death in conflicts they did not choose.

Museums and heritage sites have also taken up the theme. A feature on Unsung Heroes of describes service animals in World War II, including dogs that located wounded soldiers, horses that pulled artillery and pigeons that carried messages across enemy lines. The same account emphasizes that animals worked in every theater of the war, from European fields to Pacific islands, and that their contributions were essential to logistics and communication.

Another blog from the same heritage site, reachable through a separate link on animals in service, stresses that these creatures often faced the same dangers as humans: shellfire, gas, hunger and exposure. Many were abandoned or killed when armies retreated, a reality that contrasts sharply with the affectionate stories of mascots and decorated heroes like Cher Ami or Wojtek.

Even personal diaries from the front hint at this burden. A New Zealand soldier’s Somme diary, quoted in a feature titled “Three weeks in hell by one who knows,” describes the Battle of the Somme as “straight dinkum hell, no doubt,” and notes that they were talking about the Germans but it was equally true of our own troops, as Harper observes that New Zealand’s Somme involvement suffered terrible losses. While the diary focuses on human suffering, the same muddy, shell-torn landscape also trapped horses, mules and other animals that had no choice but to endure.

As more archives are digitized and historians pay closer attention to non-human participants, the picture of war becomes more complete. The glowworm jars, gas-detecting slugs, messenger pigeons, sea lions, napalm bats and the 440-pound bear are not just curiosities. They are part of a broader story about how humans extend their reach through other species, and about the ethical questions that follow when those species are drawn into human conflicts.