After the main 1918 German offensive that began well for them but ended with the disaster of Reims in front of the French army and at Amiens to British empire forces, The French and British armies launched "The Grand Offensive" or the "100 days offensive", systematically pushing back a German army whose efficiency was decreasing rapidly. British, French, and Belgian advances in the north-western sectors of the front, along with the French–American advances around the Argonne forest, is in turn credited for leading directly to the Armistice of November 11, 1918.