Describe the decline of the first party system

The Jay Treaty of 1794 marked the decisive mobilization of the two parties and their supporters in every state.

Explanation:

The Jay Treaty of 1794 marked the decisive mobilization of the two parties and their supporters in every state. The First Party System ended during the Era of Good Feelings (1816–1824), as the Federalists shrank to a few isolated strongholds and the Democratic-Republicans lost unity.

to protect the united states' role as a world leader, president truman wanted to prevent the soviet union from spreading communism beyond its post-world war ii boundaries. he declared that the united states must assist any nations struggling to prevent a communist takeover.