Boardgamegeek https://boardgamegeek.com/boardgameexpansion/283478/star-wars-legion-upgrade-card-pack
Anglais - Selecting the troops that you'll lead into battle is only the first step in creating your own Star Wars: Legion army. Once you've supplemented your armies with fresh recruits, you can further enhance them with the addition of upgrade cards. Each upgrade unlocks new tactical possibilities for your army, giving you the freedom to customize your units to meet your individual preferences.