Russian army officers led about 3,000 soldiers in a protest Protest against Tsar Nicholas I 's assumption Earnings_and_losses of the throne after his elder brother Constantine removed Removing himself from the line of succession .

The Uprising of Ivaylo ( ) was a rebellion Violence of the Bulgarian peasantry against the incompetent rule of Emperor Constantine Tikh and the Bulgarian nobility .

In the first months of the rebellion , he defeated Conquering the Mongols and the Tsar 's armies , personally slaying Killing Constantine Tikh in battle .

The coup Change_of_leadership was to come in two phases : an assertion of control Control in French Algeria 's major cities Algiers , Oran and Constantine .

The commanders in Oran and Constantine , however , refused Agree_or_refuse_to_act to follow Challe 's demand Request that they join Becoming_a_member the coup Change_of_leadership .

The attackers Attack were commanded Control by the 21-year-old Sultan Mehmed II , who defeated Conquering an army commanded Control by Emperor Constantine XI Palaiologos and took Getting control Control of the imperial capital , ending Process_end a 53-day siege Besieging that had begun Process_start on 6 April 1453 .

Tzachas recovered Recovering from his first defeat Conquering and retook Control several islands , but was definitively defeated Conquering at Lesbos by Constantine Dalassenos and John Doukas in 1092 .

The Battle Hostile_encounter of Brunanburh was fought Hostile_encounter in 937 between Æthelstan , King of England , and an alliance of Olaf Guthfrithson , King of Dublin ; Constantine II , King of Scotland and Owain , King of Strathclyde .

Following an unchallenged invasion Military_operation of Scotland by Æthelstan in 934 , possibly launched Process_start because Constantine had violated Legality a peace treaty , it became Becoming apparent that Æthelstan could be defeated Hostile_encounter only by an alliance of his enemies .

Olaf led Constantine and Owen in the alliance .

In August 937 Olaf and his army sailed Motion from Dublin to join Participation forces with Constantine and Owen , but the invaders were routed in the battle against Æthelstan .

The batting honours were shared with Charles Ollivierre , Lebrun Constantine , Percy Cox and Percy Goodman being the most successful .

Intensive diplomatic negotiations between King Constantine I and Allied diplomats took place Process_start throughout the summer .

Following the Noemvriana , the Allies , determined Deciding to remove Constantine I , established Building a naval blockade Besieging to isolate areas which supported Supporting the king .

After the resignation Change_of_leadership of the king on 15 June 1917 , Greece unified Cause_to_amalgamate under a new king , Alexander , Constantine I 's son , and the leadership of Eleftherios Venizelos .