Just as the title asks. Who is our oldest ally? My assumption would be France. Didn't they help us during the war of independence?
Thank you in advance.
Correct, though the Dutch and Spain could claim the title as they worked with the French to supply the revolutionaries. However they were also more focused on the other wars the revolution kicked off in Europe and India almost to the point you can debate they were separate conflicts.
There was also the Vermont Republic if you include that.