good the dog of mercy helped so many people !!! While soldiers fought in the trenches, silent heroes crossed No Man's Land on four legs. Meet Prusco, the mercy dog who saved over 100 lives during WWI by doing what no human could. His story of bravery will leave you speechless. This remarkable canine made solo journeys through artillery fire and gas attacks to find wounded soldiers trapped between enemy lines. What he did next changed battlefield rescue forever.