The UK and Japan had an alliance agreement, and when the Great War began, Japan was eager to enter the conflict. Aiding their ally was nice, but the Japanese were also eyeing German colonial possessions in the Pacific.
Kaiser Wilhelm told the troops they would be "home before the leaves fall." By autumn of 1914, it was clear they would not.
Germany invested heavily in building itself a great navy, including paying the price of a strained relationship with the United Kingdom. Now that the world is at war, how is this navy going to be used?
The Great War began as a confrontation between Austria and Russia. It soon became about a lot more than that, but for Austria, job one is defeating the Russians, or at least holding them at bay. The Austrian Army will prove incapable of accomplishing either.
President Wilson pushes through more reform legislation, including the Federal Reserve Act. The outbreak of the Great War creates a financial panic in the US, and Vice President Marshall pines for the days of a really good five-cent cigar.
The German First Army was only thirty miles from Paris, and the final victory was tantalizingly close. But the German Army was weakening, and the French and British not so beaten as the Germans believed.
In response to pleas from the French, the Russian Army undertakes an invasion of East Prussia in the hope of taking some of the pressure off of France.
The failure of the French counteroffensive has the Allies in retreat across the front, and it now appears there is no stopping the Germans short of Paris.
The Great War started as a conflict between Austria and Serbia. Now, amid all the other conflicts emerging as the war goes continental, Austria makes its bid to punish Serbia for the assassination of the Archduke Ferdinand.
The French plan to respond to a German offensive was a counteroffensive into the German center. The French attempted this on August 21-23; it was an utter failure.