Lotr map of Mouths of Entwash. it's a swampy- river-ish land south-east of Rohan. Well it's on its borders. The orcs of Saruman and Sauron fought the men of Rohan in two battles. In the second, Theodred, son of Theoden, has died. It's basicaly a blot of rivers and a lot of forests. you have an army and a small wooden fort. Use the soldiers wisely.