In this Oscar-winning cartoon (a fact that they're modest enough to mention in the opening credits) Tom and Jerry wage war on each other in the basement of a house. Using household objects as weapons in a variety of imaginative ways, they advance and retreat on each other, desperate to win their mini-conflict.
I suppose this was one of MGMs entries into the pro-WWII cartoon efforts that Disney and Warner seemed to be having a blast with. It's got a very patriotic feel to it and makes war out to be fun. I have no problem with this kind of propaganda at all, but I am surprised that PC-thug groups haven't forced outrage over this, since their lot have ruined many other Tom and Jerry cartoons. Maybe their so blinkered that they cannot really see the subtext.
Anyway, it's a surprisingly good cartoon and really did earn the Academy Award it was honored with.