I’ve re-read my previous reply and the examples weren’t all that.
In my opinion the operational level, not to be confused with an operation itself, is the actual execution of a pre-defined plan, involving on the spot decisions. Therefore only at a low level, I said platoon before but it could also be on a company level, where commanders have the immediate feel for a situation I would call it operational.
The moment you are talking about a commander studying a map and deciding where to commit reinforcements for example I would call it tactical. The decision could have an impact on the outcome of the current battle. Let say a position is successfully defended over a one-week period. Again this could also be battalion or regimental level.
Anything above that which involves the planning and the setting of the goals of a certain mission I would call a strategically level. This would be something with a broader overview of a situation, with a large impact on the outcome and thus stretching over a longer period of time.
This also implies that you cannot say that a certain command position is always operating on a set level. It might be better to attribute the level of operations to the time scale and the impact than to a position in the command hierarchy.
Mies