PRODUCTION OF COAL, IRON, AND WHEAT IN THE LEADING COUNTRIES OF EUROPE. The political divisions are shown as they were before the Treaty of Bucharest in 1913. Coal in the upper map and iron in the lower map are shown by solid black areas; wheat is shown on the lower map by the shaded areas. The solid black on each map generally shows the total area at the date of the preceding map, the shaded area the territory since added. On the first map the solid black is the area in 1450. On the map for 1806 the dotted line separates the Polish territories lost in 1815 from those retained. The limits of the present German Empire are shown on each map. Germany AustriaHungary Turkey Germany DATES OF DECLARATIONS OF WAR OR OF SEVERANCE OF DIPLOMATIC RELATIONS (the latter indicated by dates in italics). Bulgaria AustriaHungary Turkey Bulgaria Germany AustriaHungary Turkey Bulgaria July 2, 1917 July 2, 1917 Oct. 18, 1915 Oct. 15, 1915 July 2, 1917 Apr. 7, 1917 Dec. 10, 1917 Oct. 6, 1917 War declared by a Central Power (named at top of column). In all other cases declaration of war was first made by an Entente Power. +In the case of Portugal a resolution was passed on November 23, 1914, authorizing military intervention as declared war on Portugal. Guatemala. Aug. 23, 1914 Aug. 27, 1914| Aug. 7, 1914: Servia. Oct. Mar. 15, 1916 Peru an ally of Great Britain; on May 19, 1915, military aid was granted; on March 8, 1916, Germany |