In the current article the author aims to answer four specific questions. (1) What would have happened if Austria and Serbia had not gone to war in July 1914, which implies an exercise in counterfactual history, and the study of the probable outcome if events had taken a different course? (2) What exactly was Austria’s war aim? (3) What precisely was Britain’s war aim? (4) What would have happened if Britain had stayed out of the continental war?