the unk crusades ( unk ) were two crusades Military_operation sent by pope clement vi against the emirate of aydin under umur beg which had as their principal target the coastal city of smyrna in asia minor .

although clement 's concern with the crusade ended Process_end abruptly in september 1351 , the city of smyrna remained in christian hands until the siege of smyrna by the timurids in 1402 .

the french defeats Conquering at naples in 1528 and unk in 1529 , however , led to Causation francis i of france concluding Process_end the treaty of cambrai with the holy roman emperor charles v. when pope clement vii and the republic of venice also concluded Process_end treaties with the emperor , florence was left to fight Hostile_encounter alone .