During the Galactic Civil War, an Anti-war movement against the war began on several Imperial-controlled planets. Protests began with the onset of the war, but they were small and unorganized, and were not considered a threat by the Imperial High Council. However, after the Rebellion's crucial victory at Yavin, the movement gained many supporters all over the Empire. Ysanne Isard, Director of Imperial Intelligence, began brutal crackdowns on rallies, but this only garnered more supporters. Several members of the movement, seeing the righteous but futile effort, went on to join the Rebel Alliance. After the Battle of Endor, the movement died down, although several members continued protesting until the end of the war.