One of the later classic Laurel & Hardy films. They were the masters of comedy for sure. Few have ever approached their level of genius but their stars began to decline after this film which is maybe one of their last "great" films.
In "Block-Heads" they play a pair of World War One veterans, though Ollie has apparently not been told the war ended in 1918 and twenty years later was still at his guard post!
Finally relieved of duty he heads back over to the US and is reunited with his old comrade Stan, now in a rather fractious marriage, and then much mayhem ensues mostly in an apartment block with various gags and explosive antics (some literally).
Interestingly the film included quite a bit of recycling. Parts of the story were adapted from two 1920s Laurel & Hardy films and the WW1 battle scenes were taken from a number of earlier films including The Big Parade and Wings.