Cross Plainsbr/Callahan County, Texasbr/32 07.287' N 99 10.589' Wbr/Directions: Start at the intersection of SH-36 and Private Road 4146. The marker is on the south side of the intersection in the park.br/ br/Text: Route for U.S. 2nd Cavalry and supplies from San Antonio to Fort Mason (about 100 miles south of here) to Camp Cooper (about 65 miles north) in campaigns of 1851-1861 against Plains Indians. Great military men of American history traveled this road, including Robert E. Lee (later a commanding general, C.S.A.) and George T. Thomas, quot;Rock of Chickamauga.quot;br/ br/ br/ br/ Callahan County Historical Survey Committee, 1967.