Blood libels.
Prague uprising happened in 1945.
Siege of Prague happened in 1757.
Prague Offensive happened on 1945-05-11.
Battle of Omosu happened in 1580.
Treaty of Fleix happened in 1580.
Capture of Oporto happened in 1580.
War of the Portuguese Succession happened in 1580.
Siege of Carrigafoyle Castle happened in 1580.
Battle of Glenmalure happened on 1580-08-25.
Siege of Smerwick happened on 1580-11-10.
20% of 1580= 20% * 1580= 0.2 * 1580= 316