Please help me What were two fighting strategies that helped the Americans to win the
Revolutionary War?

They fired solid shells, exploding shells, and grapeshot. Cannons were effective in destroying fortifications or sinking ships. Sometimes cannons were fired strait at a line of approaching enemy troops tearing right through them and stopping their charge. Rifles were also used during the Revolutionary War.

there are no mutiple choices here

1. it was caused by feudalism

2. charlemagne used christianity as a major cornerstone for his rule. cloisters were built all over the empire to act as centers for the (re)population of the vast european wilderness.

3. the europeans feared the next raid every time chetak

i'm not so sure about #6. but i hope i you with the first 3.