Complex sentence: In March 1941, Vasey was promoted to temporary Brigadier, and took command of the 6th Division's 19th Infantry Brigade, which he led in Greece, suffering a defeat at the Battle of Vevi.
Split into simpler sentences: In March 1941, Vasey was promoted to temporary Brigadier and took command of the 6th Division's 19th Infantry Brigade. He led it in Greece, suffering a defeat at the Battle of Vevi.