When the United States held up military sales in reaction to Egyptian neutrality regarding the Soviet Union, Nasser concluded an arms deal with Czechoslovakia in September 1955. When the US and the World Bank withdrew their offer to help finance the Aswan High Dam in mid-1956, Nasser nationalized the privately owned Suez Canal Company. The crisis that followed, exacerbated by growing tensions with Israel over guerrilla attacks from Gaza and Israeli reprisals, support for the National Liberation Front's war of liberation against the French in Algeria and against Britain's presence in the Arab world, resulted in the invasion of Egypt in October by France, Britain, and Israel.