Detachments of the Federal and Confederate armies in the New Mexico Territory clash east of Santa Fe.
John Baylor, commanding Confederates in the New Mexico Territory, expresses concern that Federals are working to drive him from the region.
John R. Baylor establishes the new Confederate Territory of Arizona, and Henry H. Sibley prepares to launch his own Confederate campaign into the Southwest.
April 14, 1863 – Major General Nathaniel P. Banks avoided attacking the Confederate garrison at Port Hudson by instead targeting objectives in western Louisiana. Banks,