On March 27, 1941, Yugoslavian Air Force officers launched a bloodless coup toppling the pro-axis government. Two days before the coup, Prince Paul of Yugoslavia succumbed to pressure from Hitler to join the Tripartite Pact, a move that was deeply unpopular amongst the anti-Axis Serbian public and military.
On March 27, 1981, the Polish Solidarity movement staged a strike, in which at least 12 million Poles walked off their jobs for four hours.