There’s also the caveat that there was always someone in a war and trade was nowhere near free to start with. Anything that could possibly be made locally was because of that, the pirates and highwaymen, and just the expense of transport in a time of few proper roads and no powered vehicles. Things that couldn’t, like spices in Europe, famously ended up being worth their weight in gold.

All that adds up to few or no wars being just “trade”.