...by the end of the campaign the Allies and Central Powers would lose more than 1.5 million men."
For reference how this could affect families, my great grandmother was a German citizen during the first world war. Of her seven brothers, four or five served in the Imperial Army... Two of them never came home. Another was wounded. A cousin (in addition to the several who were killed and wounded) survived the war, only to step on a buried landmine while walking home. He lived out the rest of his life (including the second world war) with no legs.