Three months<span>, </span><span>two weeks and four days </span>
First event leading to US's enter into WWI:<span>Sinking of the Lusitania.
May 7, 1915.
American gov said stop unrestricted warfare.
Germans said okay.
</span>Second event leading to US's enter to WWI:<span>Germany publicly announces using unrestricted sub warfare again.
January 1917.
America gives second warning.
Germany ignores warning.
</span>Third event leading US's enter into WWI:<span>Zimmerman.
Telegram sent to mexico by germany.
Intercepted and decoded by great britain.
translation given to US in Feb. 1917
America begins to mobilize for war.
</span>Fourth event leading to US's entrance in WWI:<span>April 1917.
German U-boats sink four US merchant ships.
America enters the war April 6 1917.</span>
Historians have identified several reasons for why the Industrial Revolution began first in Britain, including: the effects of the Agricultural Revolution, large supplies of coal, geography of the country, a positive political climate, and a vast colonial empire.
Answer:
Technology is very needed in cold war. For example spy plane and nuclear.If nuclear doesn't exist, maybe the cuba would be invaded by the USA, and if spy tech doesn't exist, maybe the cold war would be a full blown war, between Nato and Warsaw Pact in Europe (WW3)
It’s NOT supporters saw Alaska as a foothold into Europe, while dictators were concerned that attacking Europe would be too costly ITS THE WRONG ANSWER
