The document provides an overview of Key Concept 3.3 from the AP US History curriculum framework, which discusses migration, competition over resources and boundaries, and intensifying conflicts among peoples and nations in North America from 1754-1800. It summarizes the Northwest Land Ordinance of 1787, relations with Native Americans post-Revolutionary War, the development of frontier cultures, diplomatic initiatives like the Jay's Treaty and Pinckney's Treaty, and the warnings in George Washington's Farewell Address against political parties and permanent foreign alliances. Test questions may focus on the achievements of the Northwest Land Ordinance, reasons for the emergence of political parties, and issues that led to the creation of political parties in the early