Battle of Geonosis (Earth-2042)

"The shroud of the dark side has fallen. Begun... the Clone War has."

- Grand Master Yoda

The Battle of Geonosis, also referred to as the First Battle of Geonosis, was the first major battle fought in 24 BBY between the Confederacy of Independent Systems and the Galactic Republic on Geonosis, marking the beginning of the five-year Clone Wars. It would be the first major combat of the GRSC's newly commissioned clone troopers, as well as the first major battle the Jedi would fight in years. The battle also marked the death of the notorious bounty hunter Jango Fett and the discovery of Count Dooku's dark side allegiance.

Source

 * https://starwars.fandom.com/wiki/Battle_of_Geonosis