How did the u. s. become a world power while roosevelt was president?

The main way in which the US became a world power while Roosevelt was president was that they entered World War II, which led the US to begin manufacturing war materials at a rapid pace--leading to a sudden and sharp rise in employment and GDP. 

The native americans, spanish, french and americans all name places in our state. the word “arkansas” came from the quapaw indians, by way of early french explorers. at the time of the early french exploration, a tribe of indians, the quapaws, lived west of the mississippi and north of the arkansas river.