Many writers in ignorance, or on sly purpose choose to describe Islam as Empirialist religion based on Historic evidence. This is completely fallacious. Read on..
1. "Islamic" History of war is only 40 years long. Thereafter Islam has never approved of anything that Muslim Kings have done, Muslim Kings are culprits first and foremost in Eyes of Islam
2. Islamic History of War starts with Muhammed pbuh and his followers coming out to face aggressors army in what is known as 'war of Badr'. It was purely defensive war.
3. "Islamic" wars continued for next 40 years as Islam sought to rid humanity of Parasite Kings,tyrants and warlords from face of the earth. Wherever Islamist armies gave kings/warlords a chase, they replaced it with very friendly, austere Caliphate where taxation above 4% was Strictly prohibited and Rule of Law was enforced to such level that even Caliph could not imagine of acting beyound it.
towards end of this 40 years period, some aspiring governors (Amir Muawia) from within Islamist armies staged coup and established Kingdom again. Islamists fought these new born Muslim Kings tooth and nail. But They could not restore Caliphate back. Muslim Kings repressed Islamists ruthlessly and History is witness that in their ruthlessness they Killed entire clan of Muhammed's grandson Hussain, and went on to burn Kaba in Mecca (in Yajeed - son of Muawia - period )
This was END of "Islamic" wars. No politics played after that was ISLAMIC.