Complex sentence: In 2077, Earth has been ravaged from war sixty years prior with the extraterrestrial Scavengers (Scavs); the war destroyed the Moon, causing earthquakes and tsunamis, while humanity used nuclear weapons to achieve a costly victory.
Split into simpler sentences: In 2077, Earth has been ravaged from war sixty years prior with the extraterrestrial Scavengers (Scavs). The Moon was destroyed, causing earthquakes and tsunamis, while humans used nuclear weapons for a costly victory.