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The Crisis of the Third Century
Definition by Joshua J. Mark

The Crisis of the Third Century - A Pivotal Era of Ancient Rome

The Crisis of the Third Century (also known as the Imperial Crisis, 235-284) was the period in the history of the Roman Empire during which it splintered into three separate political entities: the Gallic Empire, the Roman Empire, and the...
The Barracks Emperors
Definition by Joshua J. Mark

The Barracks Emperors - Instability of Populist Rule

The "barracks emperors" is a term coined by later historians referring to the Roman emperors who were chosen and supported by the army during the period known as the Crisis of the Third Century (also known as the Imperial Crisis, 235-284...
Boeing B-29 Superfortress
Definition by Mark Cartwright

Boeing B-29 Superfortress

The Boeing B-29 Superfortress was a four-engined, long-range bomber of the United States Air Force. The largest of all Second World War (1939-45) bombers, B-29s were used to strike Japanese targets from the summer of 1944. In August 1945...
Louisiana Purchase
Definition by Harrison W. Mark

Louisiana Purchase

The Louisiana Purchase was a land deal made in 1803, in which the United States purchased 828,000 square miles (2,144,510 km²) of land west of the Mississippi River from France for $15 million, or an average of three cents per acre. The purchase...
Chesapeake-Leopard Affair
Definition by Harrison W. Mark

Chesapeake-Leopard Affair

The Chesapeake-Leopard affair was an incident that took place off the coast of Norfolk, Virginia, on 22 June 1807 when the British warship HMS Leopard fired on and boarded an American frigate USS Chesapeake while searching for deserters from...
Trail of Tears: Memorial and Protest of the Cherokee Nation by John Ross
Article by Joshua J. Mark

Trail of Tears: Memorial and Protest of the Cherokee Nation by John Ross

The Trail of Tears was the forced relocation of the "Five Civilized Tribes" – Cherokee, Chickasaw, Choctaw, Muscogee Creek, and Seminole – from their ancestral lands in the Southeastern region of the United States to "Indian Territory" (modern-day...
American Revolution
Definition by Harrison W. Mark

American Revolution

The American Revolution (1765-1789) was a period of political upheaval in the Thirteen Colonies of British North America. Initially a protest over parliamentary taxes, it blossomed into a rebellion and led, ultimately, to the birth of the...
Twelve Great Women of Ancient Persia
Article by Joshua J. Mark

Twelve Great Women of Ancient Persia

Women in ancient Persia had more rights and greater freedom than any other ancient civilization including, according to some scholars, even ancient Egypt which is famous for its respect for the feminine principle in religion as well as daily...
Abbasid Dynasty
Definition by Syed Muhammad Khan

Abbasid Dynasty

The Abbasids were an Arabic dynasty that initially ruled over most of the Islamic empire (save some western parts) after assuming the caliphate in 750 CE, later on, their empire fragmented, however, they retained spiritual supremacy as caliphs...
Lighthouse of Alexandria
Definition by Mark Cartwright

Lighthouse of Alexandria

The Lighthouse of Alexandria was built on the island of Pharos outside the harbour of Alexandria, Egypt c. 300 - 280 BCE, during the reigns of Ptolemy I and II. With a height of over 100 metres (330 ft), the lighthouse was so impressive that...
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