Because the Incas were very behind in their warfare and military tactics, as well as lack of weapons. Their spears,slings and clubs could were no match against bullets, crossbows, swords and steel armor.
During the Crusades, Peter the Hermit is credited with recruiting 30,000 peasants and poor townspeople to volunteer as crusaders. Peter the Hermit was a priest of Amiens and is widely credited by historians of today as being one of the key leaders of the first Crusade.
Franz Ferdinad was assassinated.