Can I over assign damage to a unit?

No, you cannot over-assign combat damage.

According to Rule 460.2.c.4: "Units cannot have more damage assigned to them than the minimum required to constitute lethal damage unless no further units remain to have damage assigned to them."

Additionally, per Rule 460.2.c.3, you must assign lethal damage to a unit in full before you can move on to assign any remaining damage to a different unit.

Summary of Combat Damage Assignment:

• You must assign lethal damage (damage equal to a unit's Might) to a unit before you can assign damage to another unit.
• You cannot assign more than the lethal amount to any unit, unless it is the very last unit available to receive damage.
• If you have a Tank unit on the board, you are required to satisfy the lethal damage requirements for all Tank units before assigning damage to non-Tank units.

Note: This interpretation is based on the Core Rules 2026-03-30 regarding the Combat Damage Step. This is the official standing on over-assignment.