Military history of the Crusader states
The Seljuk–Crusader War began when the First Crusade wrested territory from the Seljuk Turks during the Siege of Nicaea in 1097 and lasted until 1128 when Zengi became atabeg of Aleppo. At the latter date, the chief threat to the Crusaders from the east and north became the Zengids. The conflict was generally fought between European Crusaders and the Seljuk Turks and their vassals. The Muslim Syrian emirates occasionally allied themselves with the Christians against rival states.
Norwegian Crusade
The Norwegian Crusade, led by Norwegian King Sigurd I, was a crusade or a pilgrimage (sources differ) that lasted from 1107 to 1111, in the aftermath of the First Crusade. The Norwegian Crusade marks the first time a European king personally went to the Holy Land.