The professional staff of the newly arrived platoon was to consist of 14 officers and non-commissioned officers selected from the regiments of the 2nd Legion Infantry Division. All professional non-commissioned officers were to come from the so-called line group, and both the platoon and corporals were to specialize in the handling of heavy machine guns (HMG). The core of the platoon was to be made up of non-commissioned officers and privates with basic military service, preferably after completing a non-commissioned officer school and passing a specialization course. This meant that only soldiers with at least a year's service in their parent military unit could be assigned to Westerplatte. From the conscripts drafted in the spring of 1938 to the 4th Legion Infantry Regiment, the best were selected. It was from among them that the guard platoon on Westerplatte was formed, using the following key:
- 20 machine gunners,
- 20 machine gunners with optical sights,
- 4 infantry support gunners,
- 5 infantry support gunners with optical sights,
- 7 infantry support gun crew members,
- 3 telephonists,
- 4 pioneers (sappers),
- 1 medic (who also served as a barber – if it was possible to find such a soldier in the regiment),
- 1 bugler,
- 1 cook;
A total of 66 soldiers.
