How successful was Islam in battles?

Answer 1

This is a nebulous question because dates and adversaries are not provided. Also "Islam" never went to battle, Muslims did.

During the Rise of Islam period (620s-750), there are several key political and regional reasons why Islam was capable of spreading as quickly and as successfully as it did. The Umayyad Caliphate extended throughout the Middle East, North Africa, Spain, and the western part of South Asia. There were also other Islamic Empires, usually lead by Turks or Turkic peoples that continued to have success in battles (Seljuks, Ottomans, Mamluks, Timurids, Mughals, Safavids, etc.) until the 1700s.

However, there were numerous failures for Islam in battles, such as the Invasion of the Mongols who not only burnt several Persian cities to the ground, sacked the Abbassid capital of Baghdad, and murdered many millions of civilians. At that point, the Muslim armies failed to put up any serious resistance (with the possible exceptions of the Hashashin Ismailis in Iran for a few years and the Mamluks at Ain-Jalut). When the Khedivites and Mamluks tried to resist European colonial armies or the when the Ottoman forces that fought in World War I, all three of those Muslim armies did pitifully in battle. (The War with the Khedivites was a slaughter - the Europeans massacred their opponents.)

Answer 2

they were successful during the time of Muhammad (pbuh) because God sent down angels to help the Muslims and God always helped Muslims during battles