The national government created by the articles of confederation would best be described as a(n) system — a loose grouping of states held together by a weak central government.

The word that best fits the statement is "federal". The articles of confederation failed for many reasons and one reason was that the states had too much power leaving the federal government weak. I hope my answer has come to your help. God bless and have a nice day ahead!

See explanation (you didn't give choices)

Explanation:

The United States of America under President John F. Kennedy showed almost no military reaction after the raising of the Berlin Wall. They sent more troops together with Vice President Lyndon B. Johnson to West Berlin, but there was no intention to reopen the border.