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The Serbian Expansion and Russian role in the Balkans.
Combined with the increase in Russian military strength, both Austria and Germany felt threatened by Serbian expansion; when Austria invaded Serbia on 28 July 1914, Russian Foreign Minister Sergey Sazonov viewed it as an Austro-German conspiracy to end Russian influence in the Balkans.
On 30 July, Russia declared general mobilization in support of Serbia; on 1 August, Germany declared war on Russia, followed by Austria-Hungary on 6th.
The cause of the first Christian Crusade was mainly because of the Muslim Turks invading and taking over the Holy Land. The effect of the First Crusade was that the Christians captured Jerusalem and other key cities
Geography The Age of Exploration caused ideas, technology, plants, and animals to be exchanged around the world. Government Several European countries competed for colonies overseas, both in Asia and the Americas. Economics Developments during the Age of Exploration led to the origins of modern capitalism.
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Benedict Arnold was discovered but escaped
