Cher Ami was a messenger pigeon used by the American army in France during WWI. A battalion of 550 troops was surrounded by the German army and the allies thought they were in a different location. The Major was trying to send out messages for help, but the messengers he sent (humans and pigeons) kept getting killed.
The allies began to drop artillery fire onto their location not knowing it was them. The Major sent out another pigeon, Cher Ami, with the message
…For heavens sake stop it.
Cher Ami was shot down with a bullet in his chest and another almost severing his right leg. Even though he had been blinded in one eye he got back up and flew almost 60 mph (96 km/h) to his destination and delivered the message that saved 194 soldiers.
The pigeon in the gif is a jerk.