How were unions and northern cities affected by the manufacturing decline?
Unions-
Northern Cities-

by 1970, competition led employers to either eliminate high-paying manufacturing jobs or else to

Explanation:

the American industry had developed, the quality of American's life had also ... All of the first great American cities were seaports or major river ports.The three largest northern seaports in the early US were Boston, New Yorkand Philadelphia

because the vietnam war was fought in an especially brutal and untraditional way