Safe Attacking

Safe Attacking
UpgradeCost: 1
Your tech 0 and I units get +1 armor while they attack. (Armor absorbs damage before HP and is then destroyed.)
White Tech 0

Card-Specific Rulings
After your unit finishes its attack (after combat damage is dealt), it loses the armor Safe Attacking granted if it still had it. — Sirlin
If something readies that unit and you attack with it a second time that turn, it will get 1 point of armor again. — Sirlin