Ironically, some contemporary historians have speculated that William's campaign may have been funded, at least in part, by Pope Alexander VIII as part of a shared hostility with William to Louis XIV of France, who at the time was attempting to establish dominance in Europe and to whom James was an ally.
William's forces defeated James' army of mostly raw recruits. The symbolic importance of this battle has made it one of the best-known battles in British–Irish history and it is a key part of the folklore for the Orange Order.
The Williamite side comprised of 36,000 troops made up of 12 nationalities, among then, Dutch, Danes, Germans, French Huguenots, English, Scottish, Irish, Swiss, Italians, Norwegians and Poles. The Jacobites numbered 24,000 men of five nationalities, Irish, English, Scottish, French and German.
Its commemoration today is principally by the Orange Institution.