The attack on France brings Great Britain into the war. The Front is stabilized on a line running from the English Channel to Switzerland. Russian troops invade Prussia. Advantage to the Defense Maxim Gun Barbed Wire End of Cavalry and swords Trench Warfare Machine gun gives advantage to the defense. Only masses of men could get passed a machine gun.
Artillery bombardments attempt to destroy machine guns and supplies.
The war becomes a stalemate It turns into a war of attrition. Germany and Austria-Hungary encircle Russia. France and Great Britain encircle Germany and Austria-Hungary. Germany used submarines to blockade Great Britain. Turkey joins the Central Powers.