The events happened on 9th April are :



1865 : American Civil War ended : On this day in 1865, General Robert E. Lee, commander of the Army of Northern Virginia of the Confederate States of America, signed a treaty of surrender at Appomattox Court House, ending the American Civil War.



2001 : American Airlines officially completed its acquisition of Trans World Airlines and became the world's largest airline.



1965 : The Astrodome, an indoor stadium, opened in Houston, Texas, hosting its first baseball game.



1963 : An act of Congress conferred honorary U.S. citizenship on Sir Winston Churchill.



1939 : African American contralto Marian Anderson sang to an Easter Sunday crowd of 75,000 at the Lincoln Memorial after the Daughters of the American Revolution refused to allow her to sing at Constitution Hall in Washington, D.C.



1898 : Paul Robeson, a celebrated American singer, actor, and political activist, was born.



1682 : René-Robert Cavelier, sieur (lord) de La Salle, claimed the Mississippi River basin for France, naming it Louisiana.



1388 : The Battle of Näfels culminated in a major victory for the Swiss Confederation in the first century of its struggle for self-determination against Habsburg overlordship.



8th April | 10th April