“the most decisive defeat in the history of the American military”
Hard to think that it could surmount Custer’s last stand, where only a horse survived.
Custer's command had 12 companies total, of which 3 companies under Renno, 3 more under Benteen and one company under McDougall survived.
Custer took five companies to Little Big Horn, of which none survived.
So, as a percentage, deaths were roughly half.
At the Battle of the Wabash (aka St. Clair's defeat), almost the entire command of about 1,000 men was killed by an equal number of Native Americans lead, in part, by Little Turtle.
If we compare the numbers killed to US populations then & now, in today's terms, Custer lost about 3,500 men but St. Clair lost over 100,000!
It's the greatest American army defeat nobody ever heard of.