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Most military people I have known believe the US Air Force is the safest branch to be in from a combat perspective. In the Army and Marines, the enlisted men do the vast majority of fighting, and, therefore, getting killed.
Union General Ulysses S. Grant<span> advances toward the </span>Mississippi<span> capital of Jackson during his bold and daring drive to take Vicksburg, the last Confederate stronghold on the Mississippi River.</span>
Causes of US failure in Vietnam include b) The United States supported corrupt leaders in Vietnam and d) Only a few US soldiers fought with honor.
One of the biggest issues of the Vietnamese war was that the United States went in because of anti-communism above all other reasons because of the Truman Doctrine. The South Vietnamese leaders were not well liked and were overall corrupt. The knowledge of this back home created a lot of public tension and actually caused soldiers to feel they weren't fighting for a good cause, or even commit war crimes as seen in the My Lai Massacre.
Hope I could help!
I believe B.<span>The U.S. lent military supplies in exchange for bases.</span>