User blog comment:Windyplains/A Troopless Tree System/@comment-100.2.160.144-20150426041116/@comment-173.18.56.168-20150508134757

This actually was done by giving each troop a veteran & elite upgrade that retains their equipment, but upgrades their stats. That change wasn't part of the original concept when this article was written though.

Windyplains (talk) 13:48, May 8, 2015 (UTC)