Between 1869 and 1899 the united states shifted from being an centered economy to being an economy

Isolated and World Power 

I'm pretty sure these are not the correct terms, but they definitely relate to the question. This time period marked when the US became noticed as a superpower in economics and politcal. If there's multiple choice, let me know, so don't completely copy this answer.

Hope this helps at least a little:)

Where is the map? it's not showing