There were some really good American war cartoons made during World War II, such as Donald Duck ..

.. and the more educational Private SNAFU, made by a dream team of cartoon artists:

Was World War II the last time one side of a war had all the funniest people in the world on their side?

Other cartoons were less successful.  The Hook cartoons were just thinly veiled lectures about not forgetting to buy your war bonds:

.. and then there’s Cap’n Cub, the absolute bottom of war cartoons:

Watch it to the end, where the cute little bear takes on a squadron of stoopid Jap monkeys.