How did Senator McCarthy's claims spread?

Between the world wars eisenhower's presidency the 1960s what is the organizing principle of this list?

What did the u.s. want to build on the land acquired through the gadsden purchase?

Plz ive been stuck on this question forever. in 1753 george washington was sent on a mission to a. build a fort at the point where the allegheny and monongahela rivers form the ohio river. b. attack the french at fort duquesne. c. attack the french at fort neccessity. d. deliver a message to the french demanding that they leave the ohio river.