LAWRENCE, Kan. (AP) - Efforts to establish a Civil War heritage area along the Kansas-Missouri border are moving forward. Officials are preparing to submit a management plan to the National Park Service on Thursday that could leverage up to $10 million a year for the next 15 years. The two states are trying to develop the Freedom's Frontier National Heritage Area, which covers 41 counties along the Kansas and Missouri border. The area is noted for its role in the Civil War. Officials say the plan encourages the area to market itself as the area where pro-slavery and abolitionists first battled as the Civil War began. The national designation would be a means for the region to attract Civil War buffs from across the country.