When the empire fell the states were splited. So that made easy for enemies to invade your empire .The states were divided to six forces. the first biggest force that fell your empire controlled from Demaskes to Bairot .The second biggest force (Emir)who ruled coasts of white sea .The skirmish opponents (Richard,philip and Emperor Frederick) ruled tukry and some states from your empire.The veileds who ruled and controlled lines of trains in the desert in Africa.lord Marshel controlled west side from the empire (from coast of Acre to coast of Jerusalem).finaly Sultan widen his kingdom he took three states from your empire.
papu's campaigns are full of surprises, original plots. He'd deserve many more comments.
Personal Tip: TBF-18-Save the Crusader holly places, a defence of the Jerusalem Cathedral - outdoor. ;)
Hint: if you want to restart the map type skirmish-invasion (invasion map changed into skirmish and changed back to invasion), there will appear and empty screen. Just end mission, you will come to the skirmish section, then
return to single custom maps.