What are 5 things or 5 big events that took place in world war i?

It was the first global war, This was the introduction to atomic bombs, Many technological advancements were made, I was a very destructive war nearly 17 million people died, and it was 4 years and 3 months long.

Explanation:

oh and in that pic you looking fine.

because they had ajdjdjdjdndjjs