Elements in the periodic table are grouped as metals, metalloids or semimetals, and nonmetals. The metalloids separate the metals and nonmetals on a periodic table. Also, many periodic table have a stair-step line on the table identifying the element groups.
World War I. First Battle of the Marne begins. On September 6, 1914, some 30 miles northeast of Paris, the French 6th Army under the command of General Michel-Joseph Manoury attacks the right flank of the German 1st Army, beginning the decisive First Battle of the Marne at the end of the first month of World War I.
Battles - The Second Battle of the Marne, 1918 In what began as the last major German offensive of the First World War, the Second Battle of the Marne developed into a significant Allied victory. After it became clear that the Germans had not only failed in their aim to win the war in this offensive, but had in fact lost ground, a number of German commanders, including Crown Prince Wilhelm, believed the war was lost.