Virginia's Revolutionary government constructed Fort Nelson at Portsmouth late in 1776 using timber and rammed earth. Admiral George Collier's British fleet seized its artillery and supplies and damaged the parapet in 1779. British forces under Benedict Arnold and Cornwallis later occupied the position during the Virginia campaign of 1781.

Control of coastal waters was crucial to both sides. British naval power could move troops, raid settlements, blockade trade, and protect loyal shipping, while Patriots relied on pilots, privateers, small armed vessels, lookouts, and shore defenses. Information about sails entering a bay could be as valuable as cannon. Local mariners understood channels and tides that outsiders did not, making their knowledge a military resource. Coastal warfare blurred the boundaries between naval service, commerce, intelligence, and militia duty. This location records how communities at the water's edge participated directly in the struggle.

The surviving marker text adds further detail: On the site of Portsmouth’s Naval Hospital stood Fort Nelson. There, Virginia’s Revolutionary government late in 1776 constructed the fort of timber and rammed earth. Three years later, the British fleet commanded by Admiral Sir George Collier confiscated its artillery and supplies and destroyed most of the parapet. In 1779 – 1781, Lord Cornwallis and General Benedict Arnold occupied the fort. It was reconstructed in 1799 of earth lined with brick, following a design by architect B. Henry Latrobe, and abandoned after the War of 1812. The Confederate government strengthened Fort Nelson, but on 10 May 1862 the Union army occupied Norfolk and Fort Nelson.

The site's significance is clearest when interpreted at several scales. Locally, it shows how residents and landscapes were drawn into wartime demands. Regionally, it belonged to routes of communication, supply, government, or military movement. Nationally, it demonstrates that independence emerged from thousands of connected decisions and actions rather than from famous battles alone. The physical location anchors those relationships and helps explain why timing, distance, terrain, and community participation mattered to the outcome.

The marker at Fort Nelson Marker makes this history legible in a modern landscape that has changed substantially since the eighteenth century. Its value lies in identifying the approximate place and connecting it to documented people, movements, and institutions. Visitors should distinguish the historic event from the later act of commemoration: the marker is evidence of how the episode has been remembered, while its text and setting guide interpretation of the original event. Considered with contemporary records and the broader campaign, the location adds geographic meaning to a story that might otherwise survive only as names and dates.