I’ve only had experience with one instance of how an infantry mission planning session goes. During WWII it was common practice to send AF crews to visit the front and Infantry and Artillery officers to visit, and fly with if they wanted to, AF crews.
First thing. The objective for the mission, such as “make a show of force to draw enemy attention away from the 3rd Battalion assault” isn’t a subject for discussion at the operational level where the job is to be done. That discussion and its pros and cons was discussed and decided at the next higher echelon.
How the mission is to be accomplished is very much a subject for discussion by the unit commanders who are to carry it out. In the case I witnessed, the Battalion Commander returned from Regimental HQ with the mission, which was that mentioned above. He then had a meeting with the Company Commanders and together they hashed out just how they would do the job, which company would take the lead and which would be in support and reserve, what routes to take, etc. Several different options and suggestions were made and I noticed that the Company Commanders, in this phase of the planning, were not hesitant about expressing opinions contrary to those of the Battalion Commander, respectfully of course, but put out on the table nevertheless. This took about 1/2 of an hour and then the Battalion Commander laid out his orders based on the previous discussions. From then on discussion at that level was over.
I didn’t follow through but I assume that the Company Commanders went back and got together with their Platoon Leaders for shorter planning sessions of their own. And I strongly suspect that everyone was told that this was a “draw fire” operation and others would make the actual assault. I’ve asked ex infantrymen about this and they tell me that there is a right way to go about it to make it look like a real assault to the enemh but isn’t so at least the Squad Leaders would have to know, and in that case probably everybody does. I don’t think there is much danger of a leak. Why should anyone talk when it could increase their personal danger and jeapardize an operation which, if succesful, was another step on the way out of the war?
There was none of this, “This is the way we’re going to do it because I say so.” baloney until the Battalion Commander had assured himself that the best plan they could mutually come up with had been chosen.
This might have been an unusually well run Battalion, but I’m inclined to doubt it. I don’t think considering various inputs before you commit people to an operation where they could be killed and wounded to be at all out of line and from what I saw, neither do battlefield commanders.
Of course, once the operation actually started, on the spot changes were to be made but these were at the squad or platoon level. They were carried out as well as possible under the circumstances, as when one squad of the support company took a wrong turn and ran into some mines. They had to get themselves out of it the best way they could, plan or no plan.