New weapons were introduced during World War I such as gas, aircraft, tank, submarine, machine gun, and telephone, was used against the enemies. As a result of using these new inhumane weapons, during World War I many people died than the previous wars.
Answer: Federal and russia
Explanation:
<span>The border between California and Oregon is a thin, black line; this indicates a state boundary.
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Answer: He created the concept of the "kindergarten".
Explanation: He created the concept of the "kindergarten" and coined the word, which soon entered the English language as well. He also developed the educational toys known as Froebel gifts.