William Seward, Secretary of State, and Baron Eduard de Stoeckl, Ambassador to the united States sign the Alaska Purchase Treaty, agreeing to sell the Russian enclave to the u.S. for 7,200,000 Dollars.

       [added 3/5/2021]

Subsequent Events:

4/9/1867                    7/28/1868

Authority:

Articles of Confederation, Article XI
ccc-2point0.com/articles-of-confederation

References:

Current U.s. National Debt:

$36,166,393,613,679

Source