Answer:
He led disoriented soldiers back to the trenches. Once, Stubby himself got lost, but French troops found and returned him. When German prisoners marched through Stubby’s camp, the fierce little dog had to be restrained so he wouldn’t attack them.
Sergeant Stubby wearing his coat and medals.
With all the dangers at the front, injury was perhaps inevitable for this canine soldier. During an attack, Stubby inhaled mustard gas, which required medical treatment. Later, Stubby recognized danger during another gas attack. He roused soldiers from sleep and likely saved many lives.
Explanation:
https://www.familysearch.org/blog/en/sergeant-stubby-famous-world-war-military-dog/
