被當時的人形容為不負責任及輕率的西頓及Beaufort十字軍領主Julian de Grenier於1260年趁機劫掠貝卡地區，那裏不久前被蒙古人佔領。怯的不花派遣其姪（或甥）帶同一支小部隊去追究損失，卻遭到Julian的伏擊及殺害。怯的不花於是突襲西頓城，摧毀城牆及殺害基督徒，而城堡則據說未有被攻下。[14][15]
最常被引用的對此事的研究見於由Sylvia Schein博士於1979年發表的《Gesta Dei per Mongolos》一文，她在該文結論說「聖地被宣稱的收復根本沒有發生過」。[36][37]不過Schein在她1991年的書中加入一個簡短的腳注，說蒙古人佔領耶路撒冷「已獲得證實」，因為有記載說他們於1300年取走聖殿的金門，運往大馬士革。[38]這是根據14世紀神父波吉邦西的尼科洛的記述，他詳細描述耶路撒冷的建築，及提到蒙古人對那門做過的事。另一學者Denys Pringle認為尼科洛的記述是說蒙古人試圖毀壞、焚燒或拆走該門但不成功，當馬木留克軍回來後，他們用牆封堵了那門。[39][40]
Alain Demurger在他2007年的書《Les Templiers》說蒙古人攻佔大馬士革及耶路撒冷，[41]又說合贊的將領Mulay也於1299年－1300年「有效地出現在」耶路撒冷。[42]根據Frederic Luisetto，蒙古軍「滲透入耶路撒冷及希伯崙，他們在那裏進行了多次屠殺」。[43]Andrew Jotischky在《The Crusaders and the Crusader States》中以Schein的1979年文章及1991年的書去說「在短暫及大致上是象徵式地佔據耶路撒冷後，合贊撤返波斯」。[44]
"On 1 March Kitbuqa entered Damascus at the head of a Mongol army. With him were the King of Armenia and the Prince of Antioch. The citizens of the ancient capital of the Caliphate saw for the first time for six centuries three Christian potentates ride in triumph through their streets", Runciman, p.307
"The king of Armenia and the Prince of Antioch went to the army of the Tatars, and they all went off to take Damascus".|Gestes des Chiprois, Le Templier de Tyr. "Le roy d'Arménie et le Prince d'Antioche alèrent en l'ost des Tatars et furent à prendre Damas". Quoted in "Histoire des Croisades III", Rene Grousset, p.586
The British historian Steven Runciman believes that Nablus and Gaza were occupied, but that Jerusalem itself was not taken by the Mongols. Runciman, p.308
"Hulegu informed Louis IX that he had handed over the Holy City to the Franks already, during the brief Mongol occupation in 1260 (although, as we have seen, this is nowhere indicated in any of the Muslim sources, still less in the Frankish appeals for help to the West), and the claim was reiterated in 1274 by Abaqa's envoys.", Jackson, p.174
"It happened that some men from Sidon and Belfort gathered together, went to the Saracens' villages and fields, looted them, killed many Saracens and took others into captivity together with a great deal of livestock. A certain nephew of Kit-Bugha who resided there, taking along but few cavalry, pursued the Christians who had done these things to tell them on his uncle's behalf to leave the booty. But some of the Christians attacked and killed him and some other Tartars. When Kit-Bugha learned of this, he immediately took the city of the Sidon and destroyed most of the walls [and killed as many Christians as he found. But the people of Sidon fled to an island, and only a few were slain. oe43]. Thereafter the Tartars no longer trusted the Christians, nor the Christians the Tartars." Fleur des Histoires d'Orient, Chap. 30 （頁面存檔備份，存於互聯網檔案館）
"When he disembarked in Acre, Edward immediately sent envoys to Abagha (…) As he (Abagha) could not commit himself to the offensive, he ordered the Mongol forces stationned in Turkey under Samaghar to attack Syria in order to relieve the Crusaders" Jean Richard, p.446
"Edward was horrified at the state of affairs in Outremer. He knew that his own army was small, but he hoped to unite the Christians of the East into a formidable body and then to use the help of the Mongols in making an effective attack on Baibars", Runciman, p.335
"Et revindrent en Acre li message que mi sire Odouart et la Crestiente avoient envoies as Tartars por querre secors; et firent si bien la besoigne quil amenerent les Tartars et corurent toute la terre dantioche et de Halape de Haman et de La Chamele jusques a Cesaire la Grant. Et tuerent ce quil trouverent de Sarrazins", Estoire d'Eracles, Chap XIV （頁面存檔備份，存於互聯網檔案館）
Phillips, p. 128. "Disillusionment came swiftly. Jerusalem had not been taken or even besieged; Ghazan evacuated Syria within a few weeks of its conquest probably because his horses were short of fodder. He attacked it again in 1301, and planned further campaigns for the next two years, but achieved nothing. His bitterness at the failure of the European powers to provide the military assistance he had asked for expressed itself in 1303 in yet another embassy to Philip IV and Edward I, to which Edward replied tactfully that he and Philip had been at war and could not send help."
Schein, in her 1991 book mentioned in a footnote that the Mongol capture of Jerusalem was confirmed because they had removed a gate from the Dome of the Rock, and transferred it to Damascus. "The conquest of Jerusalem by the Mongols was confirmed by Niccolo of Poggibonsi who noted (Libro d'Oltramare 1346-1350, ed. P. B. Bagatti (Jerusalem 1945), 53, 92) that the Mongols removed a gate from the Dome of the Rock and had it transferred to Damascus. Schein, 1991, p. 163
"The conquest of Jerusalem by the Mongols was confirmed by Niccolo of Poggibonsi who noted (Libro d'Oltramare 1346-1350, ed. P. B. Bagatti (Jerusalem 1945), 53, 92) that the Mongols removed a gate from the Dome of the Rock and had it transferred to Damascus. Schein, 1991, p. 163
"In December 1299, he (合贊) vanquished the Mamluks at the Second Battle of Homs and captured Damascus, and even Jerusalem", Demurger, Les Templiers, 2007, p.84
Frédéric Luisetto, p.205-206 "Troops penetrated in Jerusalem and Hebron where they committed many massacres (...) In Hebron, a cross was even raised on top of the mosque of Abraham", also p.208 "We have knowledge of the violences perpetrated in Jerusalem and Damas"
"The earliest letter was dated 19 March 1300 and addressed to Boniface VIII. Its contents suggest that it was probably written by the Doge Pietro Gradenigo (1289-1311)." - Schein, 1979, p. 814
Foltz, Richard (2000). "Religions of the Silk Road : overland trade and cultural exchange from antiquity to the fifteenth century". New York: St. Martin's Griffin. ISBN 0-312-23338-8.
Demurger, Alain. Jacques de Molay. Editions Payot&Rivages. 2007. ISBN 2228902357（法語）.
Hazard, Harry W. (editor). Volume III: The Fourteenth and Fifteenth Centuries. A History of the Crusades. Kenneth M. Setton, general editor. The University of Wisconsin Press. 1975. ISBN 0-299-06670-3.
Jackson, Peter. The Mongols and the West, 1221-1410. Longman. 2005. ISBN 0582368960.
Lebédel, Claude. Les Croisades, origines et conséquences. Editions Ouest-France. 2006. ISBN 2737341361（法語）.
Newman, Sharan. Real History Behind the Templars. Berkley Publishing Group. 2006. ISBN 978-0-425-21533-3.
Nicolle, David. The Crusades. Essential Histories. Osprey Publishing. 2001. ISBN 978-1-84176-179-4.
