The term "Union Forces" refers to the military forces that fought for the Union during the American Civil War from 1861 to 1865. These forces were primarily composed of soldiers from the northern states, who aimed to preserve the United States and end the practice of slavery. The Union Army was organized into various regiments and divisions, with notable leaders such as Ulysses S. Grant and William Tecumseh Sherman. Union Forces engaged in numerous battles against the Confederate Army, which represented the southern states that seceded from the Union. Key battles included the Battle of Gettysburg and the Battle of Antietam. The efforts of the Union Forces ultimately led to the defeat of the Confederacy and the restoration of the United States.