Hetalia: Axis Powers

This gag anime covers major historical events between WWI and WWII in a comical manner, with each country being represented by anthropomorphic caricatures. The main characters are the Axis Powers of WWII, the strict, yet soft-hearted Germany, earnest, hardworking Japan, and the lazy, gluttonous Italy. They are joined by an ever-expanding cast of characters, each representing a different nation. (myanimelist.net)