The U.S. reluctance to send Americans to fight in foreign countries for fear of getting the U.S. involved in another Vietnam is called "D<span>. the Vietnam syndrome," since the Vietnam War was viewed by many as being a foreign policy disaster. </span>
<u>Unrestricted Submarine Warfare</u> and <u>Zimmermann Telegram</u>
Answer:
to warn colonists of the British advance
Explanation: