 John 's father @-@ in @-@ law , Leo I of Armenia , died several months before the crusaders seized Damietta . He bequeathed his kingdom to his infant daughter , Isabella . John and Raymond @-@ Roupen of Antioch ( Leo 's nephew ) questioned the will 's legality , each demanding the Armenian Kingdom of Cilicia for themselves . In a February 1220 letter , Pope Honorius declared John Leo 's rightful heir . Saying that he wanted to assert his claim to Cilicia , John left Damietta for the Kingdom of Jerusalem around Easter 1220 . Although Al @-@ Mu 'azzam Isa 's successful campaign the previous year also pressed John to leave Egypt , Jacques de Vitry and other Fifth Crusade chroniclers wrote that he deserted the crusader army . 
 John <a href='null_genetive' title='1'><mark>'s</mark></a>father @-@ in @-@ law , Leo I of Armenia , died several months before the crusaders<a href='been_done' title='2'><mark></mark></a> seized Damietta . He bequeathed his kingdom to his infant daughter , Isabella . John and Raymond @-@ Roupen of Antioch ( Leo <a href='null_genetive' title='3'><mark>'s</mark></a>nephew ) questioned the will <a href='null_genetive' title='4'><mark>'s</mark></a>legality , each demanding the Armenian Kingdom of Cilicia for themselves . In a February 1220 letter , Pope Honorius declared John Leo <a href='null_genetive' title='5'><mark>'s</mark></a>rightful heir . Saying that he wanted to assert his claim to Cilicia , John left Damietta for the Kingdom of Jerusalem around Easter 1220 . Although Al @-@ Mu 'azzam Isa <a href='null_genetive' title='6'><mark>'s</mark></a>successful campaign the previous year also<a href='been_done' title='7'><mark></mark></a> pressed John to leave Egypt , Jacques de Vitry and other Fifth Crusade chroniclers wrote that he deserted the crusader army . 
John  father @-@ in @-@ law , Leo I of Armenia , died several months b4 the crusaders done seized Damietta . He bequeathed his kingdom to his infant daughter , Isabella . John and Raymond @-@ Roupen of Antioch ( Leo  nephew ) questioned da will  legality , each demanding tdaArmenian Kingdom of Cilicia fa theyself . In a February 1220 letter , Pope Honorius declared John Leo  rightful heir . Saying dat he wanted to assert his claim to Cilicia , John left Damietta for the Kingdom of Jerusalem around Easter 1220 . Although Al @-@ Mu 'azzam Isa  successful campaign the previous year also done pressed John to leave Egypt , Jacques de Vitry and other Fifth Crusade chroniclers wrote tdathe deserted thdarusader army .