In the summer of 1190 AD, in order to retake the holy city of Jerusalem, which had been captured by Saladin, the new Pope Gregory VIII announced the Launching of the Third Crusade and encouraged all European countries to send troops to join the Crusades. The Crusades were the most luxurious of the nine crusades, with the participation of King Richard I of England, King Philip II of France, and Frederick I, Holy Roman Emperor, who led the elite European knights to the eastern shores of the Mediterranean.

Crusades
The first to enter the eastern lands was the Holy Roman Empire army led by Frederick I, but the old king died before he could succeed, and when the imperial army crossed the Salifer River, the elderly Frederick I unfortunately fell into the water and died on the spot. After Frederick I's death, many of his soldiers fled back to their homeland, and the Crusaders were greatly reduced, but this change still could not stop the ambitions of King Richard I, who successfully landed under the leadership of Richard I and Philip II and captured the city of Acre, occupied by Saladin's army.
When Saladin learned of the crusaders coming again, he immediately organized an army to fight, and the two sides engaged in several mutually winning and losing battles, and the heroic and warlike Richard I inflicted heavy casualties on Saladin's army, but due to saladin's army, the crusaders were unable to break through Jerusalem and some major cities.
Saladin
Just as the two armies were at a stalemate, there was a split within the Crusaders, and there was a conflict between King Philip II and the arrogant and rude Richard I, and Philip II, who did not want to cooperate with Richard I, decided to return home, leaving only 10,000 soldiers to assist in the attack on Jerusalem. Due to the sharp reduction in troops, Richard I had to choose to negotiate with Saladin, during which Saladin repeatedly sent his brother Adil to negotiate with Richard I, and the arrival of Adil gave Richard I a new idea.
According to Arab history records, in order to stir up the feelings of saladin's brothers and win over Saladin's local Adil, Richard I planned to marry his sister Jona to Adil. He also claimed that if Saladin gave the land along the Coast of Palestine to Adil, he would give the land near acre city to Jonah to manage, and the two could jointly manage the land after marriage, and Jerusalem would become the joint residence of Adil and Jona.
Joanna's mother
Jonah and Richard I were born to henry II and queen Eleanor, jona was married to the ruler of Sicily in her early years, returned to her mother's house after the death of her husband, and after Richard I launched the Crusades, he took his sister to the East. At that time, Richard I was very close to Adil, and even called Adil "my brother" in public, and richard I wanted to marry his sister to Adil because he thought that Saladin would not agree to the marriage in order to prevent Adil from becoming bigger, and at this time, Adil was eager to marry Jonah, a marriage that was enough to break between the brothers.
But what Richard I did not expect was that after Adil reported the matter to Saladin, the generous Saladin readily agreed, and the marriage not only did not break up between saladin's brothers, but made Adil worship his brother even more. Seeing that the divisive scheme had not succeeded, Richard I could only take the plan into account and go to persuade his sister Jonna to marry Adil the Kurds.
Richard I
When Richard I told Jona about the marriage, Jonah, who had always been peaceful, actually quarreled with Richard I, who was very angry at Richard I's behavior of marrying himself to Adil as a political chip, and after rejecting Richard I, angrily declared to the outside world: "If you marry me to a Kurdish who does not believe in Christ, then I would rather die." ”
Later, Jona feared that Richard I would force herself to marry Adil, so she secretly returned to Europe, but Richard I had to tell Saladin the truth, although it did not promote a marriage, but the negotiations between the two sides were successful, the two sides decided to truce in Palestine for five years, Jerusalem still belongs to Saladin, but Christians can enter at will.