United States officials moved thereafter to expand containment into Asia, Africa, and Latin America, in order to counter revolutionary nationalist movements, often led by communist parties financed by the USSR, fighting against the restoration of Europe's colonial empires in South-East Asia and elsewhere.[98] In the early 1950s (a period sometimes known as the "Pactomania"), the US formalized a series of alliances with Japan, Australia, New Zealand, Thailand and the Philippines (notably ANZUS in 1951 and SEATO in 1954), thereby guaranteeing the United States a number of long-term military bases.[30]