Throughout the war period Portugal had to deal with increasing dissent, arms embargoes and other punitive sanctions imposed by most of the international community. The later included UN-sponsored sanctions, Non-Aligned Movement-led defamation, and myriad boycotts and protests performed by both foreign and domestic political organizations, like the clandestine Portuguese Communist Party (PCP). Near the end of the conflict, a report by the British priest Adrian Hastings, alleging atrocities and war crimes on the part of the Portuguese military, was printed a week before the Portuguese prime minister Marcelo Caetano was due to visit Britain to celebrate the 600th anniversary of the Anglo-Portuguese alliance in 1973. Portugal's growing isolation following Hastings's claims has often been cited as a factor that helped to bring about the "carnation revolution" coup in Lisbon which deposed the Caetano regime in 1974, ending the Portuguese African counter-insurgency campaigns and triggering the rapid collapse of the Portuguese Empire.