Northern Forces refer to the Union Army during the American Civil War. They were made up predominantly of states from the North who opposed slavery and sought to preserve the Union.
Related terms
Union Army: The collective term for the military forces of the Northern states during the Civil War.
Abraham Lincoln: The President of the United States during the Civil War and a prominent figure in leading and supporting the Northern Forces.
Emancipation Proclamation: A document issued by President Lincoln that declared all slaves in Confederate territory to be free, further strengthening Northern opposition to slavery.