Unit 7, spanning from 1890 to 1945, is a massive unit, so you need to keep an eye on both domestic and foreign policy. Foreign policy becomes a big deal thanks to US involvement in several wars, including the two World Wars. Domestically, the Progressive Era tries to tackle the problems of the Gilded Age, plus there is the massive up and down of the “Roaring” 1920s and then the Great Depression and New Deal of the 1930s.