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Treaties of Tilsit
The Treaties of Tilsit were two peace treaties signed in July 1807 by Emperor Napoleon I of France (r. 1804-1814; 1815) and the monarchs of Russia and Prussia in the aftermath of the Battle of Friedland. The treaties ended the War of the...

Definition
Battle of Valmy
The Battle of Valmy was a stunning French victory over a Prussian-led coalition army on 20 September 1792, during the French Revolutionary Wars (1792-1802). Although the battle was little more than a skirmish, it halted the coalition's invasion...

Definition
Schmalkaldic War
The Schmalkaldic War (1546-1547) was fought between the Protestant Schmalkaldic League and the Catholic armies under Charles V, Holy Roman Emperor, who, having failed to achieve religious unity of his subjects at the Diet of Augsburg in 1530...

Definition
Frederick II
Frederick II (l. 1194-1250 CE) was the king of Sicily (r. 1198-1250 CE), Germany (r. 1215-1250 CE), Jerusalem (r. 1225-1228 CE), and also reigned supreme as the Holy Roman Emperor (r. 1220-1250 CE). He was born in Jesi in 1194 CE but spent...

Definition
Declaration of Pillnitz
The Declaration of Pillnitz was a joint statement issued on 27 August 1791 by Leopold II, Holy Roman Emperor (r. 1790-1792) and King Frederick William II of Prussia (r. 1786-1797). The declaration appealed to all European powers to unite...

Definition
Gaiseric
Gaiseric (r. 428-478 CE, also known as Genseric and Geiseric) was the greatest king of the Vandals who remained undefeated from the time he took the throne until his death. He was probably born in 389 CE near Lake Balaton (present-day Hungary...

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Manuel I Komnenos
Manuel I Komnenos was emperor of the Byzantine Empire from 1143 to 1180 CE. Manuel continued the ambitious campaigns of his grandfather Alexios I and father John II to aggressively expand the boundaries of his empire. Manuel turned out to...

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Romanos IV Diogenes
Romanos IV Diogenes ruled the Byzantine Empire from 1068 to 1071 CE. He was a military emperor, and his policies and campaigns served to shore up Byzantine defenses against the Seljuk Turks. However, in the aftermath of the Byzantine defeat...

Definition
John II Komnenos
John II Komnenos “the Handsome” was emperor of the Byzantine Empire from 1118 CE to 1143 CE. John, almost constantly on campaign throughout his reign, would continue the military successes of his father Alexios I with significant victories...

Definition
Legio I Adiutrix
Legio I Adiutrix was a legion of the Roman army formed from veteran sailors after the death of Roman emperor Nero (r. 54-68 CE). During its long career, the legion accompanied Trajan (r. 98-117 CE) on his Dacian and Parthian campaigns, fought...