Answer:
From 1865 through 1918, which was the reconstruction and progressive era, involved the industrialization and immigration surge. It was also the period when American expanded in different ways. There was a roaming growth on the western side of American. Nonfarm income significantly increased and brought a small empire.
Also during this period, Cuba gained its independence and other countries such Philippines, Puerto Rico, and many more. Also, some small highland was possessed by Americans, and Hawaii republic joined the U.S