Ordenstdaat and whoever may have preceded it were isolated, they tried to do everything on their own.
Barca always was backed by D'Hara and Terran. And having a solid food surplus for most of their history, they've sold incredible amounts to D'Hara over time. I don't remember us having sent actual troops there since the early days, but I do recall a few direct gold transfers, though the lump of D'Haran financing came via trade. Terran sent more actual troops, I believe.
I tend to imagine Barca as having barely tamed wild lands, with pockets of agriculture here and there, a large number of very tiny isolated towns, but pestigious public institutions in the urban cores, with most cultural products (and products in general) being imports from Terran and D'Hara.
As for agricultural products, what I'd imagine would be: game (deer, elk), boar, yak, maple syrup, honey (from D'Haran-imported bees), mushrooms, beets, and cabbage.