Factors enabled the expansion of Isla

Using the assigned textbook readings and lecture notes, what factors enabled the expansion of Islam on such a large scale? What factors stopped the expansion into Christian Europe? What impact did the Islamic Conquests have on Christian Europe? Your essay needs to be a minimum of two pages and a maximum of five. You may also use outside sources. Be sure to cite! Please cite your sources. Use Chicago or Turabian style. You can use endnotes or footnotes. You do NOT need a work cited page. Double-space Size 12 font, Times New Roman or Calibri font type