* 1147 – After a siege of 4 months crusader knights led by Afonso Henriques reconquered Lisbon.

** 1270 – Before August – King Louis IX of France launches the Eighth Crusade in an attempt to recapture the crusader states from the Mamluk sultan Baibars ; the opening engagement is a siege of Tunis.

* 1289 – April 27 – Mamluk sultan Qalawun captures the County of Tripoli ( in present-day Lebanon ) after a month-long siege, thus extinguishing the crusader state.

* Before August – King Louis IX of France launches the Eighth Crusade in an attempt to recapture the crusader states from the Mamluk sultan Baibars ; the opening engagement is a siege of Tunis.

* April 27 – Fall of Tripoli: Mamluk sultan Qalawun captures the County of Tripoli ( in present-day Lebanon ) after a month-long siege, thus extinguishing the crusader state.

Mu ' in ad-Din reluctantly called for help from Nur ad-Din, but the crusader siege collapsed after only four days.

He participated in the Siege of Damascus, led by his wife's half-brother Baldwin III of Jerusalem, and with the support of Baldwin, Louis VII of France, and Conrad III of Germany, he lay claim to Damascus ; the native crusader barons preferred one of their own nobles, Guy Brisebarre, lord of Beirut, but in any case the siege was a failure and all parties returned home.

Historians ( in particular Hugh Kennedy ) have argued that the concentric defence arose as a response to advances in siege technology in the crusader states from the 12th to the 13th century.

The extent to which the crusader army was affected is difficult to gauge, but according to Matthew of Edessa one in five crusaders died from starvation during the siege and the poorer members were probably worse off.

The crusaders set to work building siege engines, as well as a fort, called La Mahomerie, to block the Bridge Gate and prevent Yaghi-Siyan attacking the crusader supply line from the ports of Saint Simon and Alexandretta, whilst also repairing the abandoned monastery to the west of the Gate of Saint George, which was still being used to deliver food to the city.

Finally the crusader siege was able to have some effect on the well-defended city.

Following a brief siege, Baibars in a rare display of mercy allowed the small crusader contingent to evacuate in exchange for surrender which they accepted.

When Joscelin heard of the siege he took the army to Turbessel, knowing that he could never dislodge Zengi without help from the other crusader states.

In 1149 Mu ' in ad-Din led raids against crusader territory, in response to their raids against the territory of Damascus which they continued to make after the failure of their siege.

Referring to the crusader siege of Shaizar in 1157, William of Tyre writes:

Byzantine resistance in unconquered sections of the empire such as Nicaea, Trebizond, and Epirus ultimately liberated the capital and overthrew the crusader states.

With supplies dwindling, a forced retreat began, culminating in a night time attack by Al-Kamil which resulted in a great number of crusader losses and eventually in the surrender of the army under Pelagius.

They were forced to fight on the crusader side.

The subsequent Siege of Damascus was a complete failure ; when the city seemed to be on the verge of collapse, the crusader army suddenly moved against another section of the walls, and were driven back.

* 1266 – Baibars expands his domain, capturing the city of Byblos ( in present-day Lebanon ) and the important castle of Toron from crusader states, and defeating the Armenians at Cilicia.

* 1268 – May 18 – The Principality of Antioch, a crusader state, falls to Baibars after the Siege of Antioch ; Baibars ' destruction of the city of Antioch was so great as to permanently negate the city's importance.

* 1270 – The ancient city of Ashkelon is captured from the crusader states and utterly destroyed by the Mamluk sultan Baibars, who goes so far as to fill in its important harbor, leaving the site desolate and the city never to be rebuilt.

* November 3 – Battle of Niš: John Hunyadi and crusader army, defeated the Ottoman Turks and captured city of Niš ; Skanderbeg left the Turkish camp and went to Albania.

* The ancient city of Ashkelon is captured from the crusader states and utterly destroyed by the Mamluk sultan Baibars, who goes so far as to fill in its important harbor, leaving the site desolate and the city never to be rebuilt.

* The Mamluk sultan Baibars expands his domain, capturing the city of Byblos ( in present-day Lebanon ) and the important castle of Toron from the crusader states, and defeating the Armenians at Cilicia.

* May 18 – The Principality of Antioch, a crusader state, falls to the Mamluk Sultan Baibars in the Battle of Antioch ; Baibars ' destruction of the city of Antioch is so great as to permanently negate the city's importance.

In Washington DC " the " Temperance Fountain was donated to the city in 1882 by Temperance crusader Henry D. Cogswell.

Because the First Crusade was largely concerned with Jerusalem, a city which had not been under Christian dominion for 461 years, and the crusader army refused to return the land to the control of the Byzantine Empire, the status of the First Crusade as defensive or as aggressive in nature remains controversial.

In an October 2010 report titled Saving Our Vanishing Heritage, Global Heritage Fund listed Famagusta, a " maritime ancient city of crusader kings ", among the 12 sites most " On the Verge " of irreparable loss and destruction, citing insufficient management and development pressures.

Two years later ( 1204 ), under the leadership of the Croatian nobleman Domald from Šibenik, most of the refugees returned and liberated the city from what remained of the crusader force.

Karak ( also Kerak ) () is a city in Jordan that is known for the famous crusader castle Kerak.

In the 12th century, Safed was a fortified city in the crusader Kingdom of Jerusalem known as Saphet.

Yaghi-Siyan was aware of the approaching crusader army as it marched through Anatolia in 1097 ; the city stood between the crusaders and Palestine.

The King of Jerusalem was the supreme ruler of the Crusader States, founded by Christian princes in 1099 when the First Crusade took the city ; it disappeared with the departure of the last crusader of Tartus in August 1291, less than two centuries later.

Although the battle of Ascalon was a crusader victory the city itself remained under Fatimid control, and it was eventually re-garrisoned.

The Prince of Antioch ruled the Principality of Antioch of the Crusader States, founded by Christian princes in 1098 when the First Crusade took the city ; it disappeared with the departure of the last crusader of in 1268.

In Tunisia, the city of Mahdia is besieged by a French crusader army.

A nighttime attack by Sultan Al-Kamil resulted in a great number of crusader losses, and eventually in the surrender of the army.

A brief intervention in 1137 – 1138 by the Byzantine emperor John II Comnenus, who wished to assert imperial suzerainty over all the crusader states, did nothing to stop the threat of Zengi ; in 1139 Damascus and Jerusalem recognized the severity of the threat to both states, and an alliance was concluded which halted Zengi's advance.

Charles, a keen crusader who took the cross in 1323, had a history of diplomatic intrigue in the Levant – he had attempted to become the Byzantine emperor earlier in his career.

In 1137 and 1142, Byzantine emperor John II Comnenus arrived in Syria attempting to impose Byzantine control over the crusader states.

In 1160, Byzantine emperor Manuel Comnenus was seeking a wife from the crusader states.

Balian's first son John of Ibelin, the " Old Lord of Beirut ", was the leader of the opposition to Frederick II, Holy Roman Emperor, when the emperor tried to impose imperial authority over the crusader states.