Thulu!

From publisher blurb: A 6-Pack Adventure: pick-up-and-play adventures designed to fill 2-4 hours of play and containing everything you need! Battle Map Tokens Pre-generated characters For longevity you can use the tokens and the map for anything else you care to do and the adventures should be fairly easily adaptable to fit into your existing campaign if you want. THULU! Has a ragged band of grizzled warriors trying to hold off the orc horde long enough for relief to arrive.