Beetle Bailey (begun on September 4, 1950) is an American comic strip created by cartoonist Mort Walker. Set in a fictional United States Army military post, it is among the oldest comic strips still being produced by the original creator. Over the years, Mort Walker has been assisted by (among others) Jerry Dumas, Bob Gustafson, Frank Johnson and Walker's sons Neal, Brian and Greg Walker. The latter is currently credited on the strip.

Beetle was originally a college student at Rockview University. The characters in that early strip were modeled after Walker's fraternity brothers at the University of Missouri. On March 13, 1951, during the strip's first year, Beetle quit school and enlisted in the U.S. Army, where he has remained ever since.

Otto is the name of Sgt. Snorkel's anthropomorphic, look-alike bulldog whom Sarge dresses up the same as himself, in an army uniform. Otto is fiercely protective of Sarge, and seems to have a particular antipathy towards Beetle. First appearance July 17, 1956, originally he was a regular dog who walked on all fours, but Mort Walker finally decided to make him more humanlike. As Walker put it, "I guess he's funnier that way." As Sarge is often found hanging on a branch protruding from a cliff face, so once was Otto.

More Info: en.m.wikipedia.org