The ill fated raid at the Little Bohemia Lodge in April, 1934 cost the life of Special Agent, Carter Baum and the wounding of SA Jay Newman and Constable, Carl Christensen.  By May 10th, Director Hoover and others at FBIHQ were seeking suggestions and recommendations from Special Agents In Charge on the logistics of conducting raids. Some SACs had come into the Bureau from local law enforcement as did some of the agents assigned to their field offices. No doubt former police officers and others could provide some valuable input as could former military personnel.    

As a result of the nationwide inquiry, documents show that as late as December, '34 the Director and Headquarters personnel had queried all SAC's (among others) during that year for opinions on conducting dangerous raids.  He ended up with more than thirty various recommendations, some more lengthy than others, and the common theme in most of them was mere "common sense."    

One submission by a long forgotten Bureau supervisor named SA E. K. Thompson caught his eye and that of the hierarchy. Thompson's suggestions address "speed, surprise and simplicity." Some of his observations on how to conduct raids made it into the FBI's early "Manual Of Instructions." We see from Thompson's own explanations that some tactics he mentions have their roots in military logistics.  

The evolving ideas on how raids should be conducted is shown here, as written by SA Supervisor Thompson.

Another submission was made by SAC John Dowd earlier in the year which deals with not only ways to make approaches, but the use of a "supply car" during raids.  You can see Dowd's suggestions here.    Dowd also reveals multiple sketches in his document on the "approach" to the raid locations. 

Those involved in law enforcement training may have a special interest in these documents.