You rally your forces with a battle cry and a calculated blow against the enemy.

Encounter   ✦     Martial, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength vs. AC

Hit: 3[W] + Strength modifier damage, and each ally within 5 squares of you can make a saving throw.

  Inspiring Presence: Each ally gains a bonus to the saving throw equal to your Charisma modifier.

Published in Player's Handbook, page(s) 150, Class Compendium.