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.
Many of the deadliest battles occurred during WWI, including Ypres, Vimy Ridge, Somme and Gallipoli. Although thousands and thousands of soldiers died during these battles, they were all turning points for the Allied Forces in helping them win the first world war. On October 3, 1918, Germany requested a cease-fire.