Tactics for the Swamp (Fortress).

The Swamp is weak in attack, but the enemy will have a hard time taking out the castle with all its bonuses; I won't even mention the Grail. In the early stages, snakes are very effective. They are a fairly fast unit and constantly inflict weakening effects, plus wyverns are built quickly. Although I rarely play as the Swamp faction, I know people who play it very well and defeat everyone.