_Merrimac_, only Confederate man-of-war; duel with _Monitor_; destroyed Mesilla (New Mexico), Baylor establishes capital at _Metacomet_ against Fort Morgan Mexican War, Grant serves in Mexico, France warned from intervention in Middle Creek (Kentucky), Garfield occupies line of Mill Springs (Kentucky), Confederates at; battle Milroy, R. H., in Jackson's Valley campaign; driven from Winchester Mine Run (Virginia), battle _Minnesota, Merrimac_ attacks Missionary Ridge, _see_ Chattanooga Mississippi, secedes; conflicting authorities balk navy _Mississippi_, Confederate ship; burnt at New Orleans Mississippi River, Union power on; Federal problem; River War (1862); River War (1863); Federals hold, Missouri, saved for Union; Southern sympathy in; River campaign (1862); Curtis in Missouri River, made Federal line of communication; last Confederate foothold on Mitchel, General O. M., raid Mobile, fleet drawn from; in Southern hands; Farragut against; Fort Morgan; army sent against; Sherman desires attack on; Grant's plan to help Farragut; taken _Monitor_, duel with _Merrimac_; Lincoln on plans for Monocacy River, Wallace delays Early at Monroe, Fortress, Federal forces at; _Monitor_ at; McClellan's plan for position at; McClellan at; McClellan leaves _Montauk_, Union monitor Montgomery (Alabama), provisional Confederate Congress Morgan, J. H., Raid; surrender; Kentucky raid Morgan, Fort Farragut against Mosby, J. S., Confederate cavalry leader Moultrie, Fort Mount Pleasant battery "Mud March," Burnside's; Mulligan, Colonel James, at Lexington (Missouri) Murfreesboro (Tennessee), Buell at