Recover
A unit that performs a recover action removes any number of suppression tokens from the unit and readies any number of the unit’s exhausted Upgrade Cards.When a unit recovers, it readies all of its exhausted cards. When a card is readied, turn it 90° to the left so it is in its original orientation. The card is no longer exhausted.Commander and Panic Check
When a unit checks to see if it is panicked, instead of using its own courage value, it may use the courage value of a friendly 
unit at 
. For example, a unit with 3 suppression tokens and courage value 1 would not be panicked if it chooses to use the courage value of a friendly at that has a courage value of 2 or greater.Clarification: A unit is panicked if at any time it has suppression tokens equal to or greater than its courage value (or a nearby Commander unit's Courage Value)[Source]
Null Courage Value
Some units have a null courage value, or “-”. These units can never gain or be assigned suppression tokens and cannot be suppressed or panicked. If a unit gains a null courage value through a special rule, it loses any suppression tokens it has, if any.If a unit has a null courage value, then friendly units at may choose to use that unit’s courage value and, therefore, never panic, regardless of the number of suppression tokens they might have.