 The realities of "Frenchness" however, are extremely complicated.Even before the late 18th-19th century, "metropolitan France" was largely a patchwork of local customs and regional differences that the unifying aims of the Ancien Régime and the French Revolution had only begun to work against, and today's France remains a nation of numerous indigenous and foreign languages, of multiple ethnicities and religions, and of regional diversity that includes French citizens in Corsica, Guadeloupe, Martinique and elsewhere around the globe also in America.The creation of some sort of typical or shared French culture or "cultural identity", despite this vast heterogeneity, is the result of powerful internal forces — such as the French educational system, mandatory military service, state linguistic and cultural policies — and by profound historic events — such as the Franco-Prussian war and the two World Wars — which have forged a sense of national identity over the last 200 years.