Increases the chance to hit of all melee weapons by 20%, bringing the total bonus to +20%. Many weapons have a starting accuracy of 10%, giving a total accuracy of 30% with this skill.
Items that use this combat tree are most likely to be found in Museums and Factories. Quite a few can be Crafted by Smithing. The best weapon for a low level character is probably an Axe as it deals 5 damage and does not decay.