Henry VI vs Tervel of Bulgaria

Henry VI was elected King of Germany in 1190 following the death of his father Frederick Barbarossa. He succeeded without opposition, inheriting a powerful Hohenstaufen realm.

Pope Celestine III crowned Henry VI Holy Roman Emperor in Rome on April 15, 1191. The coronation was delayed due to tensions with the Papacy over Henry's claims in Sicily.

Henry VI captured King Richard I of England in December 1192 near Vienna and held him for ransom. Richard was released in 1194 after payment of a huge ransom, which Henry used to fund his Sicilian campaign.

Henry VI conquered the Kingdom of Sicily in 1194 after the death of King Tancred. He was crowned King of Sicily in Palermo on December 25, 1194, uniting the island with the Empire and creating a vast Mediterranean domain.

Henry VI proposed a plan to make the Empire hereditary and to launch a crusade to conquer the Byzantine Empire. The plan failed due to opposition from German princes and Henry's sudden death in 1197.

Tervel provided military support to the exiled Byzantine Emperor Justinian II, helping him regain the throne. In return, Tervel was awarded the title of Caesar and received territorial concessions.

Tervel signed a treaty with the Byzantine Emperor Theodosius III that established borders, regulated trade, and included a clause for mutual defense. This treaty strengthened Bulgarian-Byzantine relations.

Tervel, Khan of Bulgaria, sent a Bulgarian army to aid the Byzantine Empire during the Second Arab Siege of Constantinople. The Bulgarian forces attacked the Arab rear, contributing to the lifting of the siege and saving the city.