The Posse Comitatus Act is roughly a century after the Revolution. Being an easier-amendable congressional law means the wording can be much more precise, calli

The Posse Comitatus Act is roughly a century after the Revolution. Being an easier-amendable congressional law means the wording can be much more precise, calling out each branch of military specifically. And yet even still, some of those branches have domestic law enforcement duties. The third amendment was a reaction to the large amount of British troops being embedded throughout society, with those troops performing domestic law enforcement duties. So I'd say that regardless of the split that developed later, domestic law enforcement falls wholly within the 1700's meaning of soldiers. It's not like the founders were against externally-facing standing armies but just peachy keen on internally-facing standing armies.