As the Vietnam War raged in 1969, John Lennon and his wife Yoko Ono held two week-long Bed-Ins for Peace, one in Amsterdam and one in Montreal, each of which were intended to be non-violent protests against wars, and experimental tests of new ways to promote peace. The idea is derived from a "sit-in", in which a group of protesters remains seated in front of an establishment until they are evicted, arrested, or their demands are met.