Until the beginning of 1938, a mobilization plan was in force in the Polish Armed Forces. But in view of new events, the plan was found to be inappropriate to reality, both in terms of mobilizing human resources and military units, and in terms of mobilizing material supplies.
Plan "W"
The growing danger of war forced the development of a new mobilization regime - a plan in force from April 30, 1938.
The new mobilization plan was based on the military-political concepts of the Second Polish-Lithuanian Commonwealth, based on the theory of two enemies. It was distinguished by its unity and flexibility in the event of a war either with the USSR or with Germany.
Its mobility was based on the possibility of introducing a number of changes into it as the military-political situation changed. With the possibility of carrying out either emergency (secret) mobilization according to the system of individual conscription of the next contingents, or general (explicit) by means of an appropriate official notification of the population. Covert mobilization could be carried out either throughout the country or in some regions, depending on the direction and level of the military threat.
Thus, it was possible to change the scope of mobilization by defining its territorial coverage or the categories of reservists who needed to be attracted to perform certain tasks.
For this, a system of differentiated mobilization agendas was introduced:
- The “brown group”, divided into five subgroups, concerned the mobilization of the Air Force, Air Defense, units of the Ministry of Railways, units and services of the second department of the General Staff, headquarters of the high command;
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"Green group" - units located in border areas;
- "Red group" - units intended for operations in the eastern direction;
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"Blue group" - units intended for operations in the western and northern directions;
- "Yellow group" - parts intended to strengthen the "red" or "blue" group;
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"Black group" - a limited contingent in the event of a local conflict.
General mobilization was envisaged in two stages. On the first stage, the armed forces had to reach combat readiness within 6 days from the moment of the announcement of mobilization (day "X"). And on the second, which began between the third and fifth day from day "X", the armed forces had to reach full combat readiness between the tenth and twelfth days of general mobilization.
According to the mobilization plan, about 75% of the troops were to be put on alert through the emergency mobilization system. It included 26 infantry divisions (including 2 reserve), 11 (all) cavalry brigades and the only (10th) tank motorized brigade. Partly under the emergency mobilization fell 4 infantry divisions (including 2 reserve).
General mobilization additionally affected 7 infantry divisions (including 3 reserve). In the course of mobilization, emergency and general, the state police, the border guard and the Border Guard Corps were supposed to bring the states to the military timetable. The Ministry of Railways and the Ministry of Posts and Telegraphs were to form their own technical, construction and repair units according to military standards.
The mobilization of the people's defense battalions was to be carried out according to a slightly different scheme - the so-called "gatherings", which could be announced for each battalion separately according to the circumstances.
Plan "W2"
In May 1939, amendments to the plan were introduced - the so-called mobilization plan.
It includes all the changes and additions that were not taken into account in the plan and which were indicated by the headquarters responsible for the mobilization. So, according to the plan, the number of divisions subject to emergency mobilization was increased by two reserve ones, the formation of two additional infantry divisions and the reorganization of the 10th Panzer Motorized Brigade (it received the name of the Warsaw) began.
In addition, plans were developed to mobilize units directly subordinate to the Ministry of Military Affairs - fortress battalions and companies, air defense divisions, heavy artillery divisions, etc., as well as the system of mobilizing the national defense.
Finally, according to the plan, the mobilized army was supposed to have 1,500,000 servicemen in line, march and militia units and formations.
In connection with the German occupation of the Czech Republic and Moravia, on March 23, 1939, the first, partial, emergency mobilization under the "red" and "yellow" summons was initiated in military districts IV (Lodz) and IX (Brest). This mobilization brought four infantry divisions, one cavalry brigade and auxiliary units to alert.
In addition, the personnel of the border and coastal units was increased, and some of the reservists were called up for unscheduled exercises. On August 13, in Military District II (Lublin), an emergency mobilization of reservists with "green", "red" and "black" subpoenas was launched, which brought two infantry divisions, one cavalry brigade and auxiliary units to alert.
Finally, on 23 August, full emergency mobilization began in five military districts. 18 infantry divisions, 2, 5 reserve divisions and 7 cavalry brigades were put on alert. Emergency mobilization of still unmobilized units, in particular, in districts VI and X, began on August 27. At the same time, orders were issued on the formation of subdivisions of the Ministry of Posts and Telegraphs. Fully three infantry divisions and two cavalry brigades were brought to combat readiness, and in part two line and one reserve infantry divisions and one motorized tank brigade.
Only on August 29 was a general mobilization announced, which, however, had to be interrupted under the onslaught of France and Great Britain. England and France were ready to make concessions at the expense of Poland and tried to bargain with Germany on acceptable terms.
Instead, they received a list of 16 demands that Germany put forward in an ultimatum against Poland. In Warsaw, they learned about them at night from 30 to 31 August. And in response, in the morning, the Polish government resumed general mobilization.
Fascist German forces invaded Poland on the morning of September 1, 1939.
All formations mobilized in an emergency manner were already on alert, but not all of them managed to reach the deployment areas in defensive positions.
For the rest of the mass of troops, it was the second day of general mobilization, which was already being carried out under enemy fire and bombs and in conditions of disrupted communications.
By September 1, the Poles managed to put on alert and deploy the following forces on the defensive lines:
In the ground forces:
Operational group - 2 infantry divisions, 2 cavalry brigades;
Operational group - 1pd;
Army - 2 infantry divisions, 2 cavalry;
Army - 5 infantry divisions, 1 cavalry brigade;
Army - 4 infantry divisions, 1 cavalry brigade;
Army - 3 infantry divisions, 1 cavalry brigade;
Army - 5 infantry divisions, 1 tmbr, 1 cavalry brigade, 1 gsd;
Army - 2 gsbr.
Together it was: 22 infantry divisions, 8 cavalry brigades, 3 mountain rifle brigades, 1 tank motorized brigade, as well as scattered parts of the national defense, coastal defense, border and fortress services, etc.
In aviation:
army aviation - 68 bombers, 105 fighters, 122 reconnaissance aircraft (together - 295 aircraft);
RGK aviation - 36 bombers, 50 linear aircraft, 54 fighters, 28 reconnaissance and liaison aircraft (together - 168 aircraft);
Total: 463 aircraft.
In the fleet:
destroyer division (1 unit);
destroyer battalion (12 units);
submarine division (5 units).
