Short answers, pulled from the story.
General Order No. 3 was issued by Gordon Granger on the 19th of June 1865 in Galveston, Texas. It informed the people of Texas that all slaves were free in accordance with Abraham Lincoln's Emancipation Proclamation, which had taken legal effect on the 1st of January 1863. The order also stated that the former relationship between masters and slaves now became that between employer and hired laborer.
Gordon Granger delivered General Order No. 3 in Galveston, Texas on the 19th of June 1865, enforcing the Emancipation Proclamation for the first time in Texas, which had seen little Union military presence during the war. The joyous demonstrations by the freed people that day originated the annual Juneteenth celebration. Since 2021, the 19th of June has been a federal holiday in the United States.
On the 20th of September 1863, the second day of the Battle of Chickamauga, Granger marched his Reserve Corps to reinforce Major General George H. Thomas on Snodgrass Hill without receiving orders to do so. He directed James B. Steedman to send two brigades to Thomas's position, and the intervention held the Union line until nightfall, allowing Federal forces to retreat in good order.
Gordon Granger died on the 10th of January 1876 in Santa Fe, New Mexico, while serving in command of the District of New Mexico. He is buried in Lexington Cemetery in Kentucky.
Granger and Grant had a strained relationship that may have begun at West Point, where Grant held the grudge more than Granger did. After the Battle of Chattanooga, Grant blocked Granger from prominent commands because Granger had resisted a request from General Phil Sheridan to pursue the retreating Confederate army. Granger's political alliance with President Andrew Johnson further deepened the rift as Grant aligned with the Radical Republicans.
Granger commanded the IV Corps at the Battle of Chattanooga, which included the assault on Missionary Ridge. Two of his divisions, those led by Thomas J. Wood and Philip Sheridan, were ordered to take the rifle-pits at the base of the ridge but continued climbing and routed the Confederates from the crest, forcing General Braxton Bragg's army to retreat in disorder.