In 1420 , the Treaty of Troyes was signed Sign_agreement , by which the English king married Forming_relationships the French princess Catherine and was made Manufacturing regent Change_of_leadership of the kingdom and heir to the throne of France .

In the three-day battle Hostile_encounter the Ottoman army under the command Control of Sultan Murad II defeated Conquering the Crusader army of regent John Hunyadi .

Calculating that he would need more than 40,000 men to defeat Conquering the Ottomans , the Hungarian regent sought to join Becoming_a_member up with anti-Ottoman Albanian forces Motion , possibly led by Skanderbeg .

On hearing of the enemy army approaching Self_motion king Harald 's regent , his uncle Guttorm , quickly raised Cause_change_of_position_on_a_scale an army and marched Self_motion towards the army advancing Cause_to_make_progress overland .

Ferdinand was both the king of Aragon and regent of Castile in 1512 .

After his death and his young son King Cheng 's coronation , King Wu 's brother Dan , the Duke of Zhou , declared Expressing_publicly himself regent and took over Change_of_leadership the court .

Due to Joanna 's mental instability , Castile was ruled Control by the nobles and her father , King Ferdinand II of Aragon , as a regent .