You knock your adversary off balance with your shield and follow up with a strike.
Encounter ✦ martial
Melee 1
Requirement: You must be using a shield.
Target: One creature
Attack: Strength + 2 vs. Reflex
Hit: 1d10 + Strength modifier damage, and you push the target 1 square and knock it prone.[MP:8]
Special: If you are a dwarf, the attack deals extra damage equal to your Wisdom modifier.
Special: When charging, you can use this power in place of a melee basic attack
Shield Bash is a first level Fighter encounter attack power, for use with adventurers using a shield. It is introduced in Martial Power as an option for shield-based fighters, to inflict simple damage before pushing the target and knocking it prone.
Although it is initially rated as average, the power becomes practically useless as you gain levels as the power does not scale. In general, Shield riposte would be a slightly better option due to increased accuracy and scaling.[Charop Fighter]