Virginia at first refused to join the Confederacy, but did so after President Lincoln on April 15 called for troops from all states; that meant Federal troops crossing Virginia on the way south to subdue South Carolina. On April 17, 1861 the convention voted to secede, and voters ratified the decision on May 23. Immediately the Union army moved into northern Virginia and captured Alexandria without a fight, and controlled it for the remainder of the war. The Wheeling area had opposed secession and remained strong for the Union.