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Before the war In the late 1800s and early 1900s, European nations began a massive military buildup, in part to protect their overseas colonies from rival powers. At the same time, these nations formed a complicated network of alliances to protect themselves from opposing armed forces.
The similarity about warfare in these time period was that many nations began to build armies and also form alliances with other to fight against opposition forces.
These different nations began to form lots of alliances out of the need to protect themselves from the opposing armed forces that existed in other nations.
Overtime the advances that were made in the fields of science and technology brought about the changes in the way that wars were fought worldwide.
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