The Biafran Airlift was an international humanitarian relief effort that transported food and medicine to Biafra during the 1967-70 secession war from Nigeria (Nigerian Civil War). It was the largest civilian airlift and, after the Berlin airlift of 1948–49, the largest non-combatant airlift of any kind ever carried out. The airlift was largely a series of joint efforts by Protestant and Catholic church groups, and other non-governmental organizations (NGO)s, operating civilian and military aircraft with volunteer (mostly) civilian crews and support personnel. Several national governments also supported the effort, mostly behind the scenes. This sustained joint effort, which lasted one and a half times as long as its Berlin predecessor, is estimated to have saved more than a million lives.