July 1, 1916. The First Day of the Battle of the Somme. Despite the heavy loss of life and failure to achieve the expected breakthrough, Field Marshal Haig and General Rawlinson deemed the attack a success, so much that the offensive was to continue for a further four months, only ending with the onset of winter. - prisonersofeternity.co.uk
The Treaty of Versailles was what ended war with Germany, requiring them to pay for the damages of WW1, forcing them to disarm their military, and accept responsibility for causing the war. This map shows how the Treaty created nine new nations as well, now that the Central Powers had to surrender their colonies to the Allies.