July 28th was the 100th anniversary of Austria-Hungary's declaration of war on Serbia, which marked the start of hostilities that quickly mushroomed into the Great War. In response Russia started partial mobilization 100 years ago yesterday, and Germany mobilized (with Russia starting full mobilization in response) 100 years ago today. By 100 years ago next Monday (August 4), those four, plus France, Belgium and Britain, were all at war with each other and armies numbering in the millions wer