President Eisenhower's words of warning in his Farewell Address foreshadowed what American era?

He warned the nation Vietnam war.

Explanation:

In the most illustrious words of his presidency, he warned that the country "must guard against the acquisition of unwarranted influence by the vested interest." President of the {united states|United States President|President believed that the United States had "to maintain balance" between defense defrayal and therefore the wants of a healthy economy.

He warned the nation of what is known as the Industrial era.