Although the United States pursued a policy of official neutrality, it provided aid to the Allies in various forms. One of the most prominent ways was Lend-Lease. Initially, the U.S. provided European nations with support to defend themselves against the Nazi onslaught in the form of food, supplies and war material. The Destroyers for Bases program allowed the U.S. to give the British 50 obsolete destroyers in exchange for 99 year leases on British bases in Newfoundland and the Caribbean. As the British capacity for repayment dwindled, Lend-Lease was presented as a viable alternative. It allowed the British to get the supplies they needed but did not require immediate repayment. These Lend-Lease agreements were extended to more than 30 countries during the course of the war.