The Weapon Triangle is a tactical fighting system that has been a mainstay of the Fire Emblem series since the fourth game, Fire Emblem: Genealogy of the Holy War.
In this system, sword wielders have a better hit chance against axe-type weapons, axes have a better hit chance against lances, and lances are more liable to hit swords. In Rekka no Ken and The Sacred Stones, there are weapons that reverse the weapon triangle. For example, an "Axereaver" functions as a lance, but its functionality reverses to be effective against axes while being weak against swords. The bow and knife are neutral in the weapon triangle, as are all types of magic, themselves having a separate 'triangle', the Trinity of Magic. Similar to the trinity of magic, an advantage can make it impossible for the foe to critical, damage, or even hit you.
- FE4: +/- 20 Hit%
- FE5: +/- 5 Hit%
- FE6: +/- 1 Mt, +/- 10 Hit%
- FE7-FE8: +/- 1 Mt, +/- 15 Hit%
- FE9-FE10: +/- 1 Mt, +/- 10 Hit%
- FE11: +/- 10 Hit%