Editing Military doctrine (section)

===United States===
In the period between the [[Napoleonic Wars]] and the [[World War I|First World War]], doctrine was defined by the [[United States Department of War|War Department]] in "[[List of United States Army Field Manuals#Field Service Regulations|Field Service Regulations]]". In addition, many officers wrote military manuals that were printed by private publishers, such as Hardee's Tactics, used by both [[Confederate States of America|Confederate]] and Union forces. General [[George B. McClellan]] wrote a cavalry manual, ''Regulations and Instructions for the Field Service of the U.S. Cavalry,'' in 1862.

The General Staff became responsible for writing Field Service Regulations. They were published in 1908, were revised in 1913 and again in 1914 based on experiences of European powers in the first months of the war.

As late as 1941 U.S. Army doctrine was published in ''[[List of United States Army Field Manuals#Field Service Regulations|Field Service Regulations&nbsp;– Operations]]''. This designation was dropped and replaced by [[United States Army Field Manuals|U.S. Army Field Manuals (FM)]].