Czar Nicholas II and his wife. After Revolution of 1905 he failed to solve Russia's basic political, economic and social problems, this sparked eruptions. March 1917 the first of two revolutions toppled the Romanov dynasty and started more radical changes.
Bloodiest War in American History: Not the Civil War -- World War Two. Although more American died in the Civil War, more Americans were killed in WW2. It's a pedantic technicality perhaps, but the Civil War was America's deadliest war, World War II its bloodiest.
Making the world better, one answer at a time. Gettysburg was the bloodiest and the fighting took place over three days with over 50 thousand casualties. The bloodiest single day battle was at Sharpsburg, Maryland at Antietam creek and had over 25k casualties. The term casualties meaning killed, wounded, MIA or POW.