The Cross of Lorraine is part of the heraldic arms of Lorraine in eastern France. It was originally held to be a symbol of Joan of Arc, renowned for her perseverance against foreign invaders of France (in her case, the English). Between 1871 and 1918 (and again between 1940-1944), the northern third of Lorraine was annexed to Germany, along with Alsace. During that period the cross served as a rallying point for French ambitions to recover its lost provinces. This historical significance lent it considerable weight as a symbol of French patriotism.
      The flag of Free France featured a red Cross of Lorraine on a standard Flag of France.
During World War II, the cross was adopted as the official symbol of the Free French Forces (French: Forces Françaises Libres, or FFL) under Charles de Gaulle.
      The vice-amiral Émile Muselier suggested the adoption of the Cross of Lorraine as symbol of the Free French, both to recall the perseverance of Joan of Arc (whose symbol it had been), and as an answer to the Hakenkreuz.
      In his general order number 2 of 3 July 1940, vice-admiral Émile Muselier, then chief of the naval and air forces of the Free French for only two days, created the bow flag displaying the French colours with a red cross of Lorraine, and a cocarde also featuring the cross of Lorraine.
Appropriately, de Gaulle is memorialised by a 43 meter high Cross of Lorraine at his home village of Colombey-les-Deux-Églises.
      The cross was also carried on the fuselages of aircraft flying on behalf of the Forces Aériennes Françaises Libres (FAFL) from 1940 to 1943 to distinguish them from the aircraft of the Vichy French air force, which continued to sport the traditional French air force (Armée de l'Air) roundels, dating from World War I.
      The Cross of Lorraine was later adopted by Gaullist movements such as the Rally for the Republic.