Statistics for occurrence #1 of “Indian Territory” in chapter 2.7 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 1: The Opening Battles.:

...ntucky, 138; Ohio, 3; Indiana, 4; Illinois, 1; Missouri, 244; Minnesota, 6; California, 6; Kansas, 7; Oregon, 4; Nevada, 2; Washington Territory, 1; Utah, 1; New Mexico, 19; Nebraska, 2; Colorado, 4; Indian Territory , 17; Dakota, 11; Arizona, 4; and Idaho, 1. It soon became evident that the official record of the War of 1861-5 must be compiled for the purposes of Government administration, as well as in the i...
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