The new machine guns, artillery, trenches and mines made it very difficult to attack. The generals had fought many wars without these, so they ordered their armies to attack in the old style of marching in rows- allowing the enemy to shoot them down easily. At the Battle of the Somme in 1916 60,000 British men died in a single day. It was one of the bloodiest days in the history of the British army. Late in the war the British and French invented tanks and used them to attack entrenched Germans but could not make enough of them to make a big difference. The Germans invented special Sturmabteilung tactics to infiltrate enemy positions, but they also were too little, too late.