Alter Aeon Online Help

Keywords are:  'warrior skill knockback knockdown'

Skill: knockback                Lvl 12 Warr  (21%)
                                (helpful)   Requires: bash
                                Group: Warrior power attacks
                                
                                Speed: very slow

Usage:
knockback            - try to find an appropriate target
knockback <target>   - knockback a specific target
knockback all        - knockback everything attacking you

The 'knockback' skill is used to knock back an opponent and get some
breathing room between attacks.  When sieged by many enemies, knockback
can sometimes allow you to push back the entire crowd long enough to
escape.

Knockback doesn't do much damage on its own - rather, the intent is
to push enemies back temporarily.  Being successful often relies on
surprise, so you won't be able to knock back enemies repeatedly.