American Legion Missing in Action Post 231 Lake Texoma located 7 miles north of Pottsboro Texas off Hwy 289 on Lake Texoma. Come for a visit, dinner or campout. 15 RV spots with Electric and Water, 30 and 50 amp sites. Contact us for more info. The objects and purposes of this Post shall be to promote the principles and policies as set forth in the American Legion Preamble, and the National and Department Constitutions of The American Legion.