When allocating combat damage to a unit that already has damage on it, do you need to allocate the full lethal amount or only enough to reach lethal?

Question

Accepted Answer

Ruling: You only need to allocate enough damage to reach lethal. If a unit already has damage on it, you only need to assign the remaining damage needed to kill it.

Sequence:
- Calculate how much damage the defending unit already has
- Assign only enough additional damage to reach lethal (equal to its might)
- Remaining damage can be allocated to other units

Nuances:
- Even with effects that make any damage lethal (like Imperial Decree), you still must assign lethal damage to each unit - you cannot simply assign 1 damage to everything