Bring 6 bags of Crudely Dried Meat to Uthek the Wise in the Gelkis Village.
When we are not at war, we hunt for meat. Meat gives us strength, and full bellies fight harder than empty ones.
It is the same with the Magram. They store extra meat so they may fight longer between hunts. If you raid their village to the east and take their stores of meat, then their strength will fail.