Frederick I: Did you mean...?

Coal mining boomed during the British Industrial Revolution as it provided fuel for steam engines of all kinds in factories, transport, and agriculture. Draining flooded mines to extract more coal was the reason the steam engine was invented...

The Mongol invasions of Russia and Eastern Europe occurred first with a brief sortie in 1223 CE and then again in a much larger campaign between 1237 CE and 1242 CE. The Mongols, seemingly coming from nowhere and quickly gaining a reputation...

Washington Reviewing the Western Army at Fort Cumberland, Maryland, before their march to suppress the Whiskey Rebellion. Oil on canvas painting attributed to Frederick Kemmelmeyer, c. 1795. Metropolitan Museum of Art, New York.

Saladin (1137-93) was the Muslim Sultan of Egypt and Syria (r. 1174-1193) who shocked the western world by defeating an army of the Christian Crusader states at the Battle of Hattin and then capturing Jerusalem in 1187. Saladin all but destroyed...

The Crusader States (aka the Latin East or Outremer) were created after the First Crusade (1095-1102) in order to keep hold of the territorial gains made by Christian armies in the Middle East. The four small states were the Kingdom of Jerusalem...

Tycho Brahe (1546-1601) was a Danish nobleman who made the most significant contribution to our knowledge of astronomy before the telescope arrived. He discovered a supernova, observed the elliptical interplanetary orbit of a comet, updated...

The War of the Sixth Coalition (1813-1814), known in Germany as the Wars of Liberation, was the penultimate conflict of the Napoleonic Wars (1803-1815). The Sixth Coalition, which included Russia, Austria, Prussia, the United Kingdom, Sweden...

The German Peasants' War (1524-1525) was a conflict between the lower class of the Germanic region of the Holy Roman Empire and the nobility over the feudal system of serfdom, religious freedom, and economic disparity. It was later characterized...

George I of Great Britain (r. 1714-1727) succeeded the last of the Stuart monarchs, Queen Anne of Great Britain (r. 1702-1714) because he was Anne's nearest Protestant relative. The House of Hanover secured its position as the new ruling...

Gustavus Adolphus (l. 1594-1632; r. 1611-1632) was the King of Sweden who elevated his country to a major power in the 17th century. He also is traditionally recognized as the "Father of Modern Warfare" for his military innovations and his...