For the guild on the the defensive side, it wins the battle if the "City-Defense Totem" is not destroyed within 2 hours or if the "City-Invasion Totem" is destroyed.

For the guild on the invasive side, it wins the battle if the "City-Defense Totem" is destroyed within 2 hours and the "City-Invasion Totem" is not destroyed. In this case the guild on the invasive side will take over control of the city.