cards - StephenE/DevoLAN GitHub Wiki
The desk of region cards contains a single card for each region, with a randomly chosen symbol (infantry, mounted or artillery). A player earns a card by capturing at least one region in a given round. A player can never earn more than one card in a round in this way.
If a player loses their last regions in a round, their cards are split evenly between those regions and awarded to the owner of those regions at the end of the round. If a player loses more regions in the round than they have cards, the cards are distributed randomly between the regions they owned.