Connections

Bugs' catchphrase "Of course you realize, this means war!" is taken from Duck Soup.

One line from this cartoon later used in other cartoon - "Of course you realize this means WAR!"

The battle scene at Appleloosa when a buffalo strikes a haystack with an anvil behind it is the same gag from the 1953 Bugs Bunny cartoon Bully for Bugs, in which a bull hits an anvil behind Bugs' toreador cape. A bit earlier, one of the buffalo is sharpening its horns on a grindstone wheel, which is done by the bull in the aforementioned cartoon.