A watchtower, alternatively referred to as a sentry tower, was a raised structure, either supported by a physical post or a repulsorlift platform, where a sentry would be positioned to watch for any incoming threats. During the Clone Wars, the Confederacy of Independent Systems employed multiple watchtowers in Iziz, the capital city of the planet Onderon. The Alliance to Restore the Republic also built several of these towers at the Massassi Site on Yavin 4 for use by Rebel sentries. Many years afterward, the Resistance installed a watchtower at their base within the Ancient ruins close to Black Spire Outpost located on Batuu.