While Diem was eventually assassinated and his government toppled in a November 1963 coup d'état, the coup sparked a rapid succession of leaders in South Vietnam, each unable to rally and unify their people and in turn overthrown by someone new. These frequent changes in leadership caused political instability in the South, since no strong, centralized and permanent government was in place to govern the nation, while the Viet Minh stepped up their infiltration of the Southern populace and their pace of attacks in the South. Having supported the coup against President Diem, Lodge then realized it had caused the situation in the region to deteriorate, and he suggested to the State Department that South Vietnam should be made to relinquish its independence and become a protectorate of the United States (like the former status of the Philippines) so as to bring governmental stability. The alternatives, he warned, were either increased military involvement by the U.S. or total abandonment of South Vietnam by America.