The Battle of the Somme started on July 1st 1916. It lasted until November 1916.
The most games against German forces were made on September 17th.
<em>July 1st </em>was a disaster for the British. When the soldiers advanced, they were killed by machine gun and rifle fire. It was the bloodiest day in the history of the British army.
On <em>September 17th</em>, the British could not compete with the Germans in the air. The Germans launched a massive attack, but their advance was defeated by French artillery and machine guns, which stopped them in their tracks.