Europe plunged into war in 1914 with the Russian mobilization of troops on the Austrian and German borders.
Germany declared war on Russia and France in response to the Russian mobilization.
France and Britain declared war on Austria and Germany in response to the Russian mobilization.
The Central Powers consisted of Germany, Austria-Hungary, and later Bulgaria and the Ottoman Empire.
The Allied Powers included Great Britain, France, Russia, and later Japan and Italy, who switched sides.
The war stalled along the Western Front, with a bloody, deadlocked battle.
The German Schlie ff en Plan was designed to avoid war on two fronts.
The German army would invade France and then wheel around into Russia according to the Schlie ff en Plan.
The Germans almost succeeded in the Schlie ff en Plan, getting to the edge of Paris before being pushed back along the Marne River.
The First Battle of the Marne ended the Schlie ff en Plan and forced a two-front war.
WWI saw new kinds of warfare, including the use of chemical weapons like poison gasses for the first time.
Machine guns, x-rays, blood banks, and fighter planes were also used in WWI.
The Russians were not yet industrialized and by 1916 they were on the brink of collapse.
Trench Warfare was a new innovation brought about by WWI.
There was a "No Man's Land" in the middle of the trenches, filled with barbed wire, shell holes, and thousands of dead soldiers.
The war resulted in an incredible loss of life for very small gains.
Hundreds of miles of intertwining trenches contributed to a stalemate in the war.
New military weaponry combined with outdated military techniques resulted in large scale death and destruction.
The battles of Verdun and the Somme illustrate how brutal the war was.
The trenches were filled with rats, mud, disease.
The conflict became global and spread to parts of Asia.
The outcome of the war for Russia was affected by their lack of industrialization.
In February 1916, the Battle of Verdun resulted in both sides losing 300,000 men and the Germans gaining 4 miles.
The Battle of the Somme resulted in the British losing 20,000 soldiers in the first day and the British gaining 5 miles.
The Eastern Front involved the Germans and Austro-Hungarians versus the Russians and Serbs.
The Russians were completely blocked by the Central Powers and only had their massive population as an advantage.
The four main causes of World War I were: Nationalism, Rising Tensions in Europe, Entangling Alliances, and the Balkan Peninsula.
Nationalism unified countries like Italy and Germany and worked to tear larger empires like the Ottomans and Austrians apart.
Rising Tensions in Europe were fueled by Imperialism and Industrialization, creating rivalries between the major European powers.
European countries had border disputes that were causing tension.
Europeans believed that to have truly great countries, they also had to have great militaries, leading to a huge increase in military spending and preparedness.
The policy of militarism ensured Germany's safety with alliances, but Bismarck believed France wanted revenge for the Franco-Prussian War.
The Dual Alliance was formed between Austria and Germany in 1879.
The Treaty with Russia was signed between Germany and Russia in 1881.
The Triple Alliance was formed between Germany, Italy, and Austria in 1882.
In 1890, Kaiser Wilhelm II forced Bismarck to resign, and the Treaty with Russia lapsed, leading to a situation where Germany would have to fight a two-front war.
Wilhelm built up the German navy, so Great Britain signed a treaty with France and Russia called the Triple Entente.
The Balkans were a “powder keg” due to clashing ethnicities, religions, and nationalist groups.
Bulgaria, Greece, Montenegro, Romania, and Serbia had already broken away from the dying Ottoman Empire.
Slavic groups led by Serbia, who was supported by Russia, pushed for their independence.