Vigo often aided American forces during the Revolutionary War, most famously as an informant to George Rogers Clark.

[citation needed] In addition to his services as a patriot and spy, Vigo was the foremost financier of the American Revolution in the Northwest.

When Clark arrived with Continental promissary notes of paper, Vigo exchanged them evenly for hard coin.

Francis Vigo died March 22, 1836, while living in the home of Jean Baptiste and Elizabeth (Martin) LaPlante, in Vincennes.

The George Rogers Clark National Historical Park erected a statue of Vigo by John Angel in 1934, on the waterfront of the Wabash River.