overrunning an 30-mi. sector of the Hindenburg Line; on Oct. 5 Black Check Cock homing pigeon Cher Ami (Fr. "good friend") helps save the surrounded Lost Battalion of the multiethnic (42 different languages) U.S. 77th Div. , led by Maj. Charles White Whittlesey (1884-1921) 1/2-mi. ahead of the front line at Charlevaux