The campaign, dubbing the area as "The Land of Arklatex", was based on the idea that "the interests of all the people in the Tri-state area of South Arkansas, North Louisiana and East Texas are practically identical in matters pertaining to agriculture, industry, commerce and trade, and education." The region is alternatively, although seldomly in most media and promotional parlance, referred to as "Arklatexoma", which more inclusively encompasses McCurtain County and other parts of extreme Southeastern Oklahoma that lie along the Red River. The Ark-La-Tex covers over across the four-state area. Most of the Ark-La-Tex is located in the Piney Woods, an ecoregion of dense forests of mixed deciduous and conifer flora. The forests are periodically punctuated by sloughs and bayous that are linked to larger bodies of water such as Caddo Lake or the Red River. Three of the four National Forests located within the Piney Woods of East Texas are wholly or partially within the Ark-La-Tex boundaries: Angelina National Forest (spanning Angelina, Nacogdoches, San Augustine and Jasper counties), Sabine National Forest (near Hemphill) and Davy Crockett National Forest (between Lufkin and Crockett). The Red River is the principal mainstem waterway in the region, exiting from the eastern end of Lake Texoma and running generally east along the Oklahoma–Texas border towards Southwestern Arkansas (entering near the state line between Little River County, Arkansas and Bowie County, Texas) before turning southward northwest of Texarkana (forming the eastern border of Miller County) and going into Northwestern Louisiana. The bordering cities of Shreveport and Bossier City were developed along the river bank; its span within the Ark-La-Tex ends in Natchitoches Parish, Louisiana (where the Red River spans to the adjacent northwest of its namesake county seat) at its intersection with Grant and Rapides parishes. As with all vernacular regions, the Ark-La-Tex has no official boundaries or status and is defined differently by different sources. Most definitions of the Ark-La-Tex delineate the region to encompass 40 parishes and counties: Alternate definitions can include eight additional Texas counties (Lamar, Delta, Hopkins, Franklin, Wood, Smith, Cherokee, and Angelina), include the Monroe, Louisiana metropolitan area and Ouachita Parish, Louisiana (which is considered part of the Ark-La-Miss region), exclude the counties encompassing the El Dorado, Arkansas micropolitan area, or exclude McCurtain County, Oklahoma.