The Battle of Second Manassas/Second Bull Run (Virginia) ends: After two days of fighting General Robert E. Lee, commanding the Confederate Army of Northern Virginia, defeats the compulsory Union Army of Virginia, commanded by Major General John Pope, at a cost of 17,000 American lives.

       NOTE: Pope alone lost 15,000, and was relieved from his post as General-in-Chief.

       [added 4/3/2022]

Subsequent Events:

References:

Second Battle of Bull Run – Wikipedia, the free encyclopedia
en.wikipedia.org/wiki/Second_Battle_of_Bull_Run

Chronology Of The American Civil WarChronology Of The American Civil War
civilwarhome.com/timeline.htm

Current U.s. National Debt:

$36,161,621,015,445

Source