What did the Aryans have a strong tradition of?

in 1500 the Aryans invade, Aryan - means noble in a language called Sanskrit, Aryans - indo Europeans that settled into the cities, didn't leave evidence because they were nomads, they don't have a lot of stuff, don't create Indo - European tribe, nomadic, didn't leave that many artifacts, had a lot of oral tradition which was passed down, eventually written down in Sanskrit - Aryan system of writing, written into books called the Vedas - a lot because they know they are going to move