The European war against
Muslim expansion was recognized as a "religious war" or
bellum sacrum from the beginning. The early modern wars against the
Ottoman Empire were seen as a seamless continuation of this conflict by contemporaries.
[1] The term "religious war" was used to describe, controversially at the time, what are now known as the
European wars of religion, and especially the then-ongoing
Seven Years' War, from at least the mid 18th century.
[2]
In their
Encyclopedia of Wars, authors
Charles Phillips and
Alan Axelrod attempt a comprehensive listing of wars in history. They document 1763 wars overall, of which 123 (7%) have been classified to involve a religious conflict.
[3] William T. Cavanaugh in his
Myth of Religious Violence (2009) argues that what is termed "religious wars" is a largely "Western dichotomy", arguing that all wars that are classed as "religious" have secular (economic or political) ramifications.
[4] Similar opinions were expressed as early as the 1760s, during the
Seven Years' War, widely recognized to be "religious" in motivation, noting that the warring factions were not necessarily split along confessional lines as much as along secular interests.
[5]