Which invading warrior group ultimately caused the medieval european rulers to band together?

all of the following apply except for (a. excessive credit on real estate resulting in defaulted loans.

in 1819, panic swept the country due,in part, to the rapid expansion of american manufacturing during the war of 1812 and the distress caused by the post-war british competition. the rapid expansion of american farming was another factor.

explanation:

u go to preference and ull see a button that says i want to delete my acc click on it.

no one really purchased it themselves, it was all america, they had debates etc.