From Wikipedia

A number of the citations on the medals awarded to the troopers at Wounded Knee state that they went in pursuit of Lakota who were trying to escape or hide. Another citation was for "conspicuous bravery in rounding up and bringing to the skirmish line a stampeded pack mule." Another medal was awarded in part for extending an enlistment. One citation was just "bravery".

It is very clear what message Hegsheth wants to send here, and it is not that catching a pack mule is "conspicuous gallantry and intrepidity at the risk of life above and beyond the call of duty." The massacre at wounded knee is one of the darkest chapters of our history.