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.
Okinawa became the bloodiest battle of the Pacific War. More than 100,000 Japanese died, a frightening number matched only by the tally of unfortunate Okinawan citizens who perished in the fighting. Army casualties of more than 4,600 dead and 18,000 wounded were almost equaled by 3,200 Marines dead and 13,700 wounded.