The red war horse primarily symbolises war and bloodshed, and is associated with power, strength, and success in battle. 
In Celtic mythology, the goddess of war is associated with the colour red.
A tiny pink flower on the horse symbolises resilience and beauty in the face of horror, violence and war. 
The juxtaposition of a tiny, delicate pink flower on the horse, within the brutal context of war, creates a powerful symbol of regeneration, of life continuing amid death, and of the enduring human spirit and the fleetingness of human life.