The main difference with the Articles of Confederation to the constitution is having the lack of Central Leadership in which we had didn’t have no national court system or judicial branch and an executive branch to enforce any acts passed by Congress as well being able to have presidential figure to represent America without a representative to conduct foreign affairs especially with Britain at the time. America wasn’t able to deal with internal and external threats since Congress could not draft troops and were dependent on states to contribute forces. The constitution fixed this by adding three branches executive,legislative and judicial also adding the checks and balances system. We also have an army now but congress has to authorize to