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Hammer and anvil
warlord attack 1

Target: one creature

Attack: Strength vs. Reflex

Hit: "1[W] + Strength modifier damage. One ally adjacent to the target can make a melee basic attack against it as a free action, with a bonus to the damage roll equal to your Charisma modifier."[PH:145][Dr397:17]

Hammer and anvil is an encounter power available to warlords at 1st level.

CharOp Evaluation: Good [Charop Warlord]

The "I attack and an ally attacks" power is a staple for the Warlord, and this is a perfect example. It's a solid power, especially for Charisma-focused Warlord. That said, there's better options this level- only pick this if nothing else appeals to you.