Yes. The most famous one was Rin Tin Tin, who was born in a trench in 1918, and Buddy, the first Seeing Eye dog is the son of a German Shepherd War dog from WWI.
They would be messengers and would also attack the ememies by force. Many Shepherds died in the war doing this sort of thing.
the German "U-Boat".
World War 2, blitz is short for "blitzkreig"
Enigma was used for war. Enigma was first invented by German engineer in World War 1.
German cheppered
the German military in world war 11
The Lewis gun was used by German's American's, and the UK:-)
U-boats
After world war II
German U-boats.
zufalls
The Germans used a variety of cannons in WW 1.