Answer:
After Germany declared war on Russia, France with its alliance with Russia prepared a general mobilization in expectation of war. On 3 August 1914, Germany responded to this action by declaring war on France.
The Turks were defeated by Crusaders at Jerusalem because "they could not remain united," since it was this lack of unification that led to their forces being divided and reckless. <span />
American settlers rebel against Mexico because they wanted overthrow Santa Anna.
Go to the Tang Dynasty period because of all the advances in technology and innovations created.