My view is that the late war organizations organized out of the Enrolled Missouri Militia was an attempt to create an elite group of men who could be relied upon. In July 1862 when the EMM was organized, substantial numbers of men were disloyal and entire companies were never called upon to serve. I give the 78th EMM of Ste. Genevieve Co., Mo. as an example as they are no where in the wartime records. The Provisional Enrolled Missouri Militia was an attempt to pull out men from the EMM who could be relied upon but suffered from many poor decisions. The men were "detailed" rather than volunteers and were only as good as the EMM companies from which they came. I have studied the 8th Provisional EMM in Southeast Missouri recently and they suffered from poor administration so that, though organized in May 1863, many men were not detailed and put on duty til August 1863 and then many sent to work on fortifications.
Officers could not wait to get out of that service and the regiment was disbanded in Nov. 1863.

Next came the Provisional Enrolled Militia era which encompasses the Order 89 and 107 men. A good letter that is two days before Order No. 89 is in the OR Series I Vol. 34 Part 4 pg. 268-269 Col. J. B. Rogers to Gen. Ewing 6/8/1864. Rogers recommends that "none but a voluntary organization will do for home warfare and they most carefully selected." See also the same volume, page 260-261 for the conditions at the time of the Order No. 89 troops. Order No. 89 troops were voluntary with the officers selected by the Brig. Gen. of the District and the communications seen suggest the seriousness of this plan. Some of the Enrollment Cards with the Missouri State Archives mention Order 89 troops (see Morgan Mace). Five companies of Order 89 volunteers continued to serve in the 3rd Mil. District per a communication of Jan. 18, 1865 P. R. Gaulding Maj. A. A. Gen. to Brig. Gen. S. P. Simpson, Adjt. Gen. Missouri so they were not disbanded when other troops were later organized.

General Order No. 107 troops were organized by communications of June 28, 1864, along with the Committees of Public Safety, and remained in service into the Spring of 1865 and a short time later (summer 1864) troops were recruited to meet the Price threat. Taken as a whole, there seems little thought was given to wholesale recruitment for several different organizations with the same goals. I like another contributor's comments of the "mish-mash" theory and doubt if any soldier really knew to which organization he belonged until General Orders No. 134. I know the threat of guerilla activity in Southeast Missouri was real and these attempts were made to meet that threat with local, loyal manpower. I am free to discuss this further at robts@hughes.net. Bob