Was the us justified in going to war in vietnam

What role and side did italy fight on during world war 1? why did they change sides? write this in your own words.

All of the following were weaknesses of the articles of confederation, except: a) the central government was not permitted to regulate state, interstate, or foreign trade. b) the central government was not permitted to borrow money. c) the central government had little ability to regulate money. d) the central government had no ability to tax.

How does the balance of trade look different in the us today vs hot it looked in the 70's