Explanation:
The First Battle of Bull Run, also known as the Battle of Manassas, marked the first major land battle of the American Civil War.
Explanation:
The assassination set off a rapid chain of events, as Austria-Hungary immediately blamed the Serbian government for the attack. ... On July 28, Austria-Hungary declared war on Serbia, and the fragile peace between Europe's great powers collapsed, beginning the devastating conflict now known as the First World War.
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The ability to walk upright and the development of the opposable thumb really signifies the shift from life in the trees to life on the ground. This is the main reason why it is important.