Soldier on the Ground
Definition
At the tactical level, NATO's Allied Command Operations includes Single Service Commands such as land, maritime, and air commands, which provide expertise and support to the operational-level Joint Force Commands. These commands report directly to SHAPE and are under the command of SACEUR, contributing to the planning and execution of Alliance operations in their respective domains.
The definition of "tactical level" refers to the planning and conduct of the battle, characterised by concentrated force and offensive action to achieve objectives. It is the level where armed forces are used in engagements on the battlefield.
Source
https://www.clausewitz.com/readings/Dunn.htm
https://shape.nato.int/military_command_structure
Key words
Single Service Commands
Joint Force Commands
Tactical operations