The dead lay uncollected in heat for hours until a military wagon freed up.

Evidence

It wasn’t until three o’clock that the military finally came and gave orders as to what should be done. The wounded were to go to the Freedmen’s Hospital, which had once been Marine Hospital; the dead were to lie out in the hundred-degree heat until another wagon became available; and there was to be martial law for the rest of the night, lasting who knew until when. — Nikole Hannah-Jones et al., The 1619 Project, 767