Defence

Defence also known as def or defense is one of the combat skill in Fortis. By training defence, you also increase your resistance to damage in all forms. This means that the higher defence you have, the smaller chance your opponent has of landing a vital blow. Training defence can be useful if you are taking a lot of damage from your enemies. When your defence level reaches a specific level, you will also be able to equip armour, which will also protect you from damage. So if you do not train defence, you will not be able to wear powerful armour, resulting in you having the need of using more food to avoid death.

Experience
Defence has a vital role in the combat aspect of Fortis. The higher your defence level is, the higher are the chances that your opponent will miss his next attack. Note that a higher defence level does not mean that your opponent will hit less on a successive blow. If he hits you, it means he has penetrated your armour. The thing that defence does is reduce the chances of him actually penetrating the armour you are wearing or your skin. Unlike a few other combat skills, defence can actually be trained with all combat styles (Melee, ranged and magic). To train defence while using any of these styles, you must choose the "Defence" combat style. When using melee, you can train defence individually or together with attack and strength. If using ranged, you can only train defence together with ranged and if you are using magic then you can also, only train defence together with magic.

Something you should note is that 1/4 (25%) of all the experience that you gain goes towards constituion - No matter of what attack option you are using. The experience you gain is based on the damage that you deal, meaning that the higher output, the more experience.

Armour
The majority of armour that exists in Fortis requires you to have a specific defence level. The list is long so instead of writing everything in one article, you will be able to read about all the armour types in many divided articles.
 * Armour - A quick overview of all the armour types
 * Melee armour - A quick overview of all the melee armour types
 * Ranged armour - A quick overview of all the ranged armour types
 * Magic armour - A quick overview of all the magic armour types
 * Prayer armour - A quick overview of all the prayer armour types

Other Features
Other then armour, defence is also a requirement for several other skills, items, and more.
 * Piety requires 70 Defence
 * Turmoil requires 35 Defence