Explanation: The Allies won and both sides suffered heavy casualties.
On the first day, the brits lost 57,470 people, and 19,240 of them died. The frenchies lost 1590 people and the Germans lost 10 - 12 thousand. Over 1.5 million people died, got wounded, or went missing. For 5 days straight, the British fired shells at the German trenches to destroy them. At 7:30 am on the 1st of July, the Brits attacked the Germans, but enough machine guns survived the bombings so that the Germans mowed down the Brits. The Germans used poisonous gas. The prince of Wales served on the Somme.