11 on 11 is the last number at which defender has the advantage (when the 2 territories in question have an equal number) where the attacker wins only 49.4% of the time. At 12 on 12, odds favor the attacker at 50.7%. Attacker has advantage at all numbers greater than this.
Just a random pointless fact.
This makes no sense to me. The advantage is always with the attacker as long as he can throw one dice more than the defender.
He can do this at 4v4 but after the first 3v2 roll the attacker will mostly not be able to do it a 2nd time hence he is still an underdog to take the territory.
5v5 that changes. After the first 3v2 roll the attacker will mostly have the extra dice advantage to the end giving him the edge.
GAMBIT BATTLE ODDS CALCULATOR
2v2 territory defeated by attacker 36.26543%
3v3 territory defeated by attacker 47.02511%
4v4 territory defeated by attacker 47.65309%
5v5 territory defeated by attacker 50.62028%
the odds just get better the higher you go as the extra dice advantage has more time to work
11v11 territory defeated by attacker 57.62945%
35v35 territory defeated by attacker 69.33711%
99v99 territory defeated by attacker 82.30450%
so this shows once you get to 5v5 attack is the best form of defence