Answer:
Feb. 6, 1778
Explanation:
King Louis XVI approved negotiations to that end. With Franklin negotiating for the United States, the two countries agreed to a pair of treaties, signed on Feb. 6, 1778, that called for France's direct participation in the war.
Blitzkrieg tactics were very successful, because they were surprise attacks, so the country being attacked usually didn't have time to prepare for the attack. They were also very quick, so Germany could blitzkrieg attack another country, and then leave before the country attacked could gather its military to defend themselves.
Historical context could help you make a historical interpretation more accurately.
