Mnemonics are useful for remembering stuff. (Shocking revelation, I know.) I barely know anything about history for example. But I remember "333 - Issos Keilerei", rhymes on German and means "333 - Issos Brawl". I didn't even remember what this was about until I looked it up just now on Wikipedia.
The Battle of Issus (also Issos) occurred in southern Anatolia, on 5 November 333 BC between the Hellenic League led by Alexander the Great and the Achaemenid Empire, led by Darius III.
https://en.wikipedia.org/wiki/Battle_of_Issus
But hey, I remembered this. My history teacher back in school did something right.
And now I know some critter stuff. Thanks!