One of Americas' first war criminals and the worst thing about it was it was against his own people. One of his first actions when the war began was to shut down the free press in Maryland and in other regions, then to "silence" Maryland various state politicians were imprisoned at Ft McHenry as to shut down any opposition to the legal act of secession. Not only were these politicians arrested but they were also held indefinately without trial. Lincoln believed that the way to bring the south back into the union (although he stated that southern states never left, a huge contradiction) was through the point of bayonet as opposed to reasoned diplomacy. Most of his various other criminal acts during the war are already well known, so I won't go into much detail, they range from the burning of Atlanta, burning of Richmond, senseless destruction of southern property, farmland, animals, et al. His failure to reprimand Sherman when the general allowed a great amount of freedmen to drown in a river near Savannah because Sherman ordered his troops to leave them behind and pull up the pontoon bridges. There's much more but I can't remember it all now.