1916 Map of Casco Bay

About this map

Coastal defense and maritime transit define this landscape during the First World War era, as heavy fortifications guard the approaches to Portland and South Portland. Key military installations like Fort Mc Kinley, Fort Preble, and Fort Scammel overlook the complex network of islands and deep-water passages. Inshore, the Marine Hospital and a Quarantine Station indicate the vital role of the harbor in regional health and commerce.