Nuclear warfare....................................
Answer: true
Explanation: because Theodore Roosevelt did not want to send young troops to go to war
Answer:
Sinking of American merchant ships
Its declared decision on 31 January 1917 to target neutral shipping in a designated war-zone became the immediate cause of the entry of the United States into the war.
Explanation:
make me brainliest
<span>The treaty was signed on June 15, 1846,
ending the joint occupation with Great Britain and making most
Oregonians below the 49th parallel American citizens. ... When the
Colony of British Columbia joined Canada in 1871, the 49th Parallel and
marine boundaries established by the Oregon Treaty became the Canada–US border.</span>