This Day in Alternate History

2002--President Al Gore is tragically crushed by a rogue encroaching glacier during a lecture at the University of Maine.
1972--The Russian space progam begins building the first moon colony, christened New Vladivostok.
1948--Chancellor Adolf Hitler promises financial aid to the impoverished North American Federated States.
1863--In what is believed to be the bloodiest battle of the Civil War, Union forces led by Ulysses S. Grant are triumphant over the Confederate forces and their Martian allies.
1792--The first steam-powered airplane is successfully tested.
1517--As he preaches the evils of papal indlugences, Martin Luther is brutally gunned down by an unknown assassin wielding a .50-caliber rifle.