
The Merrimack River valley and the industrial heart of New England define this mid-century portrait of eastern Massachusetts and southern New Hampshire. Centered on the dense urban core of Boston, the map illustrates a region in transition as postwar suburbanization begins to follow the path of major transit arteries like Mass. 128 and U.S. 1. The coastal defense network is prominent throughout Massachusetts Bay, with numerous installations such as Fort Warren, Fort Independence, and Fort Banks guarding the harbor approaches.
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