The list could be endless.
O/T, what I most remember about Little Big Horn was a wall section describing Custer's dealings with the Sioux prior to Little Big Horn. He pledged he would not raise a weapon against the Sioux.
That pledge was broken at the outset of the battle, which certainly explains some of the anger and savagery of the Indians that day. It was a teaching moment for my teenage son and 7 YO grandson on the importance of keeping one's word.
The country apologized for that 30 years ago. Reagan signed the bill. I thought it was a bad idea way back then, but official apologies have become a standard feature of politics since then.