In a world that has become increasingly interconnected and dependent upon trade, the destruction of global infrastructure and the overwhelming number of wounded civilians can create severe food shortages, straining health systems, leading to riots and potentially violent social unrest. This could also lead to the spread of disease among vulnerable populations, further exacerbating the already overwhelming burden on the global healthcare system.

In the years leading up to the war, most of the major powers in Europe began to increase their military and naval power through an arms race. The assassination of Archduke Franz Ferdinand in Sarajevo acted as the trigger for war. It was felt by many German leaders that they were surrounded by enemies (France and Russia) and that the sooner they went to war, the more likely they would win. Nationalism was a driving force in this war as well, and it helped to widen the scope of the conflict.

The Allied forces land in France, in what becomes known as the Battle of the Somme. Thousands of soldiers die during this battle as a result of poor planning and an ineffective attack strategy. This was the first time that tanks were used in warfare.

Church bells ring in London for the first time since the start of the war. Prime Minister Lloyd George had tasked General Allenby with the objective of capturing Jerusalem by Christmas. He achieved this goal weeks ahead of schedule, dealing a blow to Turkish forces.