The First Battle of Ruusan occurred in 1002 BBY as one of the final battles of the New Sith Wars and the first engagement of the last campaign of the war. The battle commenced in orbit over the planet Ruusan, which the Galactic Republic used as a base to launch raids on the Sith-occupied planet Kashyyyk. When the Sith dropped out of hyperspace with a much smaller fleet of warships than that of the Republic, the latter was caught unawares by the former, and the Sith attack began.