In early 1993 the Clinton administration decided on aggressive action, ignoring both the United Nations and key European allies. The proposed policy was called lift and strike. The plan was to "lift" the arms embargo the UN had imposed on all sides, which left the Bosnian Muslims unarmed. The US would arm them so they could defend themselves. until they were fully prepared to fight for themselves, the US would hit the Bosnian Serbs with air strikes to keep them back. Christopher traveled to Europe to win support from Britain, France and Germany, but they were all staunchly opposed. By the time Christopher returned to Washington, support for the plan had evaporated, based on memories of Vietnam and fears of being plunged into a chaotic war with no end in sight. In 1994, Clinton opposed an effort by the Republicans in Congress to lift the arms embargo, as it were, because American allies were still resistant to that policy.