Rewrite the following sentences to correct parallelism for grammar and coherence. Add or delete words or rephrase as necessary.

1. The ancient Greeks celebrated four athletic contests: the Olympic Games at Olympia, the Isthmian Games were held near Corinth, at Delphi the Pythian Games, and the Nemean Games were sponsored by the people of Cleonae.
2. Each day the games consisted of either athletic events or holding ceremonies and sacrifices to the gods.
3. In the years between the games, competitors were taught wrestling, javelin throwing, and how to box.
4. Competitors participated in running sprints, spectacular chariot and horse races, and running long distances while wearing full armor.
5. The purpose of such events was to develop physical strength, demonstrating skill and endurance, and to sharpen the skills needed for war.