The League was weakened over the years by internal dissensions on political issues, especially those concerning Israel and the Palestinians and later on by the three Gulf wars. After Egypt signed a separate peace treaty with Israel on March 26, 1979, other Arab League members met in Baghdad and voted to suspend Egypt's membership and transfer the League's headquarters from Cairo to Tunis. In May 1989, nine years later, Egypt was readmitted and resumed membership. The headquarters returned to Cairo in 1990. This step was sharply disputed as members of the League were deeply divided over the Kuwait crisis and the invitation extended by Saudi Arabia to the United States, which allowed foreign military build-up in its Eastern province. The League was effectively paralyzed by the eruption of the Gulf crisis, and its future as a regional organization became highly uncertain.