Inventory of Commanders by Rank

The game End of Empire includes leaders with a number (implemented as a Marker for Rank (initial cap) = 1 for Washington, the highest ranking leader). I have folders for sides (British and American) but cannot get the leaders to sort by rank, lowest to highest. I have checked the box for Sort? and tried to use $Rank$ as the Label for Sort. I looked at the help and either didn’t see or understand the syntax. Can somebody assist? Thanks!