What happens when Leona attacks a place with too many units, but Leona survives the combat (e.g., Leona buffed to 5 might stuns one unit, but 3 units with 2 might each remain)?

Ruling: If attackers and defenders remain after combat, attackers are recalled to base.

Sequence:

• Combat resolves (Leona stuns one unit, survives damage from remaining units)
• Since both attackers (Leona) and defenders (remaining units) are still present after combat
• Attackers are recalled to base