American Civil War: The Siege of Corinth begins as Union forces under General Henry Halleck moves to engage Confederate forces led by General P. G. T. Beauregard.

The siege of Corinth, also known as the first battle of Corinth, was an American Civil War engagement lasting from April 29 to May 30, 1862, in Corinth, Mississippi. A collection of Union forces under the overall command of Major General Henry Halleck engaged in a month-long siege of the city, whose Confederate occupants were commanded by General P.G.T. Beauregard. The siege resulted in the capture of the town by Federal forces.

The Union was the central government of the United States during the American Civil War. Its civilian and military forces resisted the Confederacy's attempt to secede following the election of Abraham Lincoln as president of the United States. Lincoln's administration asserted the permanency of the federal government and the continuity of the United States Constitution.

Henry Wager Halleck was a senior United States Army officer, scholar, and lawyer. A noted expert in military studies, he was known by a nickname that became derogatory: "Old Brains". He was an important participant in the admission of California as a state and became a successful lawyer and land developer. Halleck served as the General-in-Chief of the Armies of the United States from 1862 to 1864, and then became Chief of Staff for the remainder of the war when Ulysses S. Grant was appointed to that position.

The Confederate States of America (CSA), also known as the Confederate States (C.S.), the Confederacy, or the South, was an unrecognized breakaway republic in the Southern United States from 1861 to 1865. It comprised eleven U.S. states that declared secession: South Carolina, Mississippi, Florida, Alabama, Georgia, Louisiana, Texas, Virginia, Arkansas, Tennessee, and North Carolina. These states fought against the United States during the American Civil War.