The Great Terror
The Russian Civil War followed upon World War 1 to, between them, account for the deaths of 14 million Russians in the years 1914-1917(WW1) and 1917-1921 (Russian Revolution). Of the 2 the revolution accounted for the majority of deaths: 9 million.
The death of his father Philip the Second.
Which one? 1905 or 1917? Czar was nuts, feudalism/capitalism suck, and the russians were getting their asses handed to them in WW1.
The Black Death
It was not caused by an event like a death or ships sinking. It was caused by a currently unidentified affliction that was then diagnosed a witchcraft.
the event that caused ponyboy to finally accept johnnys death because he found the good-bye letter jonny wrote to him tuked inside the book gone with the wind.
Because many people died of it. It caused the end of the mongol empire and caused the peasants revolt in 1381?
The Cretaceous Paleogene extinction event about 65 million years ago.
World War I
Mass killing of 6 million Jews in death camps
The event that caused the greatest human loss would be when he invaded Russia. His army quickly ran out of supplies once they captured Moscow (which had been burned to the ground by the Russians) and many men died their in vain. When he decided to retreat, his army took the same path that they did when they invaded so they found no supplies during their retreat which caused even more deaths.
Every event that ever happened caused another event to happen. Be specific.