On this date in history…

(2020) French designer Pierre Cardin, a pioneer in the design of high fashion for men, died at age 98. (1998) Leaders of the Khmer Rouge, the radical communist movement that controlled Cambodia from 1975 to 1979, publicly apologized for the estimated 1.5 million people who were killed during their rule. (1937) With the enactment of a new constitution, the Irish Free State became known as Ireland. (1936) American actress Mary Tyler Moore, best known for her roles on two iconic TV sitcoms—The Dick Van Dyke Show (1961–66) and The Mary Tyler Moore Show (1970–77)—was born in Brooklyn, New York. (1890) U.S. troops under Colonel James W. Forsyth massacred more than 200 Sioux Indians in the area of Wounded Knee Creek, southwestern South Dakota. (1845) The annexation of the Republic of Texas by the United States, approved by the U.S. Congress this day in 1845, sparked the Mexican War because land between the Rio Grande and the Nueces River was disputed territory. (1809) British statesman William Ewart Gladstone, who served as prime minister of Great Britain four times (1868–74, 1880–85, 1886, 1892–94), was born. (1808) Andrew Johnson, 17th U.S. president and the first ever to be impeached, was born. (1170) Knights of King Henry II of England killed the archbishop of Canterbury, Thomas Becket, in the cathedral.