Today has been Remembrance Sunday, with services and parades up and down the country to commemorate the fallen who made the ultimate sacrifice in conflicts past and present, and to reflect on the courage, service and suffering of all those affected by war.

Of course over the last few weeks we have seen red poppies everywhere - the symbol of remembrance as one of the few flowers to grow on the battle-scarred fields of the Western Front during WWI, symbolising both the bloodshed of conflict and the hope of new life.

You will have probably also noticed people choosing to wear white poppies that represent a pacifist and anti-war approach to remembering conflicts - these commemorate all people killed or affected by war, including civilians and refugees, as well as service personnel. Those who choose the white poppy because the feel it resists the normalisation, celebration, or glorification of war.

But what about the purple poppy? The purple poppy was introduced in 2006 by the charity Animal Aid, to draw attention to the millions of animals killed or injured in conflicts, that had no choice about being involved. From horses carrying supplies to pigeons delivering life-saving messages, animals were an essential part of the war effort, but their experiences were sometimes overlooked.

So lets have a look at some of the ways in which animals served their country...

Horses and mules - the backbone of WWI

When WWI began in 1914, horses were still an essential part of military life. New technologies, such as machine guns, tanks and aircraft, were developed that transformed warfare, but armies continued to depend heavily on horses and mules. They were used to transport soldiers and equipment, pull artillery guns and ammunition wagons, carry food, medical supplies and other essential resources, and move wounded soldiers away from dangerous areas. The British Army used nearly one million horses and mules during WWI, with many transported overseas from countries such as the United States and Canada.

The conditions these animals faced were extremely difficult. Horses struggled through deep mud, suffered from exhaustion and disease, and were exposed to artillery fire and poisonous gas. An important example of this is the Battle of the Somme in 1916 - although cavalry charges became increasingly dangerous because of machine guns and trench warfare, horses remained essential for transporting supplies and moving artillery across the battlefield.

This highlights an important historical point - even as warfare became increasingly mechanised, armies remained dependent on animals.

Messenger pigeons - busy birds with big responsibilities

During WWI, pigeons were among the most valuable communication tools available to military commanders - this was because telephone wires could be destroyed by artillery bombardments, and radio communication was not always reliable or practical on the battlefield. Homing pigeons offered an alternative solution - soldiers could attach messages to their legs and release them to fly back to their home lofts.

One of the most famous examples of this was Cher Ami - a pigeon used by American forces in 1918. During the Meuse-Argonne Offensive, a group of American soldiers became trapped behind enemy lines, being fired at by American artillery! Cher Ami was released carrying a message requesting that the bombardment stop -despite being badly wounded during the flight, it managed to deliver the message and the trapped soldiers were identified and saved. This shows that that military success did not depend solely on powerful weapons - communication, coordination and the ability to respond quickly to changing circumstances could be equally important.

Dogs - man's best friend in the trenches

Dogs also played a variety of important roles during WWI. Some were trained to carry messages between military positions, while others searched for wounded soldiers on battlefields - these so-called mercy dogs were particularly valuable because they could locate injured men who might otherwise remain undiscovered in dangerous areas. Dogs also served as sentries, warning soldiers of approaching enemies, and other roles included hunting for rats, carrying food and ammunition, and pulling carts and sledges.

However, their importance was not purely military. Life in the trenches could be frightening, exhausting and emotionally draining. Dogs sometimes provided companionship and comfort to soldiers who were separated from their families for months or years.

Animals in WWII - still important despite technological advancements

By the outbreak of the Second World War in 1939, military technology had advanced considerably and tanks, trucks, aircraft and other motor vehicles played much larger roles than they had in 1914. However, animals remained important to the war effort - horses and mules continued to transport supplies, particularly in areas where vehicles struggled to operate, dogs were used for guarding, searching and rescue work, and pigeons carried important military messages.

Some of these animals even became famous because of their war efforts...

Judy - the prisoner of war dog

Judy (pictured below) was an English pointer who served aboard Royal Navy ships in East Asia. After the sinking of HMS Grasshopper in 1942, she survived alongside members of the crew, but was later captured and held in Japanese prisoner-of-war camps. Judy became known for helping to protect and support prisoners, warning them of danger and providing companionship during extremely difficult conditions, and was officially recognised as a prisoner of war, an extraordinary distinction for a dog. After the conflict, Judy received the PDSA Dickin Medal in recognition of her wartime service.

Rip - the dog who searched the rubble of the Blitz

Rip was a stray dog found in London in 1940. During the Blitz of 1940-41, German aircraft bombed British towns and cities, causing widespread destruction and civilian casualties. Rip became associated with an air raid precautions rescue team and was remarkably effective at locating people trapped beneath bomb-damaged buildings. He was credited with helping rescuers find more than 100 victims of air raids and received the PDSA Dickin Medal in 1945.

G.I. Joe - the pigeon who helped save a village

Messenger pigeons remained valuable during the Second World War. In October 1943, during the Allied campaign in Italy, a pigeon named G.I. Joe delivered an urgent message that helped prevent an Allied air attack on the village of Calvi Vecchia. British troops had captured the village earlier than expected, but aircraft were preparing to bomb the area. G.I. Joe's message reached the airfield in time for the attack to be cancelled, helping to prevent potentially serious casualties among Allied troops and civilians. The pigeon was later awarded the PDSA Dickin Medal (pictured further down the page).

Sheep and biological weapons

Not all animals involved in WWII were used to transport supplies, deliver messages or rescue people. Some were used in dangerous scientific experiments designed to develop new weapons, such as the sheep on Gruinard Island, off the north-west coast of Scotland.

During WWII, the British government became concerned that Nazi Germany might develop biological weapons, that use harmful micro-organisms to cause disease. British scientists working at Porton Down began investigating whether anthrax (a potentially deadly bacterial disease) could be used as a weapon. To test its effectiveness, scientists carried out experiments on the remote, uninhabited Gruinard Island.

Sheep were transported to the island and deliberately exposed to anthrax released during experimental weapons trials. Scientists selected sheep because they were particularly vulnerable to inhaled anthrax, and by observing what happened to the animals, researchers hoped to understand how effectively the bacteria could be dispersed and cause disease.

The results were devastating and many of the sheep died within days of exposure, demonstrating the deadly potential of biological weapons. But, the experiments also had long-lasting environmental consequences as anthrax spores contaminated the island's soil, making it unsafe for normal use for decades. Decontamination work began in 1986, and Gruinard Island was not officially declared safe until 1990, almost 50 years after the original experiments.

Unlike messenger pigeons or rescue dogs, the sheep were not performing tasks that helped soldiers directly. Instead, they were used as experimental subjects to investigate weapons designed to kill. This is particularly relevant to the meaning of the purple poppy, as the purple poppy doesn't just recognise animals celebrated for bravery or military service. It also encourages us to remember animals that suffered or died because of human decisions during war.

Was the use of sheep in biological weapons experiments justified by the need to protect Britain during WWII, or does their suffering reveal the moral limits of wartime scientific research?

The Dickin Medal for animal bravery

In 1943, Maria Dickin, founder of the People's Dispensary for Sick Animals (PDSA), established the Dickin Medal. This award recognises exceptional gallantry and devotion to duty by animals serving with the armed forces or civil defence organisations, and is sometimes described as the animal equivalent of the Victoria Cross. The medal has been awarded to dogs, pigeons, horses and even a cat!

The creation of the Dickin Medal during the WWII reflects the growing recognition of the important contributions animals made during wartime, but it also raises an interesting question - can animals be described as brave in the same way as humans, when they cannot fully understand the dangers or political causes of war?

Why is the purple poppy important today?

The purple poppy encourages us to think about conflict from a different perspective - focusing on political leaders, military commanders, soldiers and major battles do not tell the whole story. The experiences of animals reveal several wider historical themes...

• The changing nature of warfare - the continued use of horses, dogs and pigeons demonstrates that technological developments did not immediately replace traditional methods of transport and communication
• The scale and impact of total war - animals were involved in both military and civilian activities, and their experiences help us understand how war affected society far beyond the battlefield
• The ethical questions raised by conflict - unlike human soldiers, animals could not volunteer for military service or understand why they were being placed in danger, and the purple poppy therefore encourages reflection on the responsibilities humans have towards animals

The purple poppy invites us to remember not only the animals that served, but also the suffering and sacrifice that accompanied their service. And perhaps the most important lesson is that understanding the full history of war means recognising the experiences of those who could never tell their own stories.

How is this relevant for the classroom?

The role of animals provides useful evidence when studying WWI, WWII, the Home Front and changes in military technology, and is a good opportunity to practise thinking about historical significance, such as these questions...

1. Why did armies continue to rely on horses and mules even after the development of tanks and motor vehicles?
2. How do the stories of Cher Ami and G.I. Joe demonstrate the importance of communication during warfare?
3. What can Judy and Rip teach us about experiences of WWII beyond the battlefield?
4. Why might the purple poppy be considered an important symbol of remembrance?
5. Which animal's contribution do you think was the most historically significant, and why?

When answering, remember that historical significance is not simply about whether something was interesting or unusual - it is also about the scale of its impact, its consequences and what it reveals about the past.