The Battle of Geonosis

The Battle of Geonosis is in Episode 3. It's when Anakin, Padme and Obi Wan get captured by Count Dooku, and Mace Windu and a lot of other Jedi try to rescue them. Then a big war happens, between the Jedi and Battle Droids. A lot of Jedi die during the war. Even a bounty hunter Jango Fett died when Mace Windu cut of his head. Soon the Jedi get surrounded by the battle droids. But Master Yoda had just brought the clone troopers and Yoda rescued the Jedi.

This is when Yoda and the clone troopers rescue the Jedi
The clone troopers are on the right side of this picture with the white armor