December 20, 1900: Arthur MacArthur Jr. Declared Martial Law in the Philippines
On December 20, 1900, General Arthur MacArthur Jr., the U.S. Military Governor of the Philippines, declared martial law across the archipelago. This drastic measure was enacted during the Philippine-American War (1899–1902), a conflict rooted in the United States' efforts to consolidate colonial control over the Philippines following the Spanish-American War. The declaration marked a significant escalation in U.S. military policy, reflecting the challenges faced by American forces in suppressing Filipino resistance led by Emilio Aguinaldo and other revolutionary leaders.