读：On April 9, 1865, the American Civil War came to an end when Confederate General Robert E. Lee surrendered to Union General Ulysses S. Grant at Appomattox Courthouse in Virginia. This marked the beginning of the Reconstruction era in the United States. --来自AI解读

读：The Battle of the Lys, also known as the Lys Offensive, was a major German attack during World War I that began on April 9, 1918. It was part of the Spring Offensive, a series of attacks by the German army in an attempt to break through the Allied lines and win the war before the arrival of American troops. --来自AI解读

读：On April 9, 1940, Germany launched Operation Weserübung, a military invasion of Denmark and Norway during World War II. The operation was designed to secure the Scandinavian countries' strategic ports and resources for the German war effort. --来自AI解读

读：The Bataan Death March, which started on April 9, 1942, was a forced march of approximately 76,000 Filipino and American prisoners of war by the Imperial Japanese Army during World War II. Thousands of prisoners died due to harsh conditions, abuse, and lack of food and water. --来自AI解读

读：On April 9, 1959, NASA introduced the seven astronauts selected for Project Mercury to the press. These astronauts, known as the "Mercury Seven," were Alan Shepard, Gus Grissom, John Glenn, Scott Carpenter, Wally Schirra, Gordon Cooper, and Deke Slayton. They were the first group of astronauts chosen for the United States' manned spaceflight program. --来自AI解读

读：The Moscow-Washington hotline, also known as the red telephone or direct communications link, was established on April 9, 1963. It was a direct communication channel between the leaders of the United States and the Soviet Union, designed to prevent accidental nuclear war by providing a means for immediate communication during times of crisis. --来自AI解读

读：On April 9, 1989, a peaceful anti-Soviet demonstration took place in Tbilisi, the capital of Georgia, which was then part of the Soviet Union. The demonstration turned violent when Soviet troops attacked the crowd, resulting in the deaths of 20 people and injuring many more. This event became known as the April 9 tragedy and marked a turning point in Georgia's struggle for independence from the Soviet Union. --来自AI解读

读：On April 9, 1991, Georgia declared its independence from the Soviet Union, becoming the first Soviet republic to do so. This declaration was a significant step towards Georgia's eventual independence and sovereignty. --来自AI解读

读：On April 9, 1992, the United States Federal Court of Appeals for the District of Columbia Circuit upheld a legal ban on the assassination of foreign leaders by U.S. citizens. This ruling was a significant decision in maintaining international relations and preventing acts of violence against foreign leaders. --来自AI解读

读：On April 9, 2003, U.S. forces seized control of Baghdad, marking the end of the U.S.-led invasion of Iraq. The invasion, which began on March 20, 2003, aimed to overthrow Saddam Hussein's regime and remove weapons of mass destruction from Iraq. --来自AI解读