US Army Regulation 25-50
The Army Regulation (AR) 25-50 Preparing and Managing Correspondence is the United States Army's administrative regulation that "establishes three forms of correspondence authorized for use within the Army: a letter, a memorandum, and a message." == Style Manuals == APD uses the following references and style manuals: Government Printing Office Style Manual - 2016 Edition Chicago Manual of Style - 16th Edition == Microsoft Word Templates == APD prepared templates for use in Microsoft Word 97 for members of the Department of the Army. There are a number of other templates and documents purporting to be templates on the Army's milSuite collaboration site.