What historical period is characterized by the formation of the National government and dominance of the Red Party, known as the "Era of Good Feeling?"

The historical period characterized by the formation of the national government and the dominance of the Democratic-Republican Party, often referred to as the "Era of Good Feeling," is best identified with the Federalist Age. This era followed the War of 1812 and is marked by a sense of national unity and political tranquility, primarily under President James Monroe's administration. During this time, the Democratic-Republicans emerged as the dominant political force, which led to a decline in the Federalist Party's influence.

The Federalist Age is significant in American history as it represents the consolidation of the nation following the struggles of the early republic. It was a time when major infrastructure and diplomatic initiatives were undertaken, enhancing national cohesion and identity. The term "Era of Good Feeling," which arose during this time, encapsulates the lack of partisan strife, with the Democratic-Republicans generally unopposed after the decline of the Federalists.

In contrast, the other choices refer to different periods in American history: the Progressive Era was focused on social reform, Jacksonian Democracy revolved around increasing democracy and populism under President Andrew Jackson, and the Roaring Twenties was characterized by cultural change and economic prosperity post-World War I. Each of these periods had