Final answer:
George Washington's farewell address emphasized the need for the United States to avoid political alliances with foreign countries, maintain national unity, and denounce partisanship.
Step-by-step explanation:
One concern that George Washington addressed in his farewell address was the need for the United States to steer clear of permanent alliances with foreign countries. He believed that while friendly trade relations with other nations were important, political alliances could drag the young nation into Europe's imperial wars and detract from its own development and security. Washington stressed the importance of maintaining national unity, denouncing partisanship, and avoiding entanglements in international conflicts.