Plan East

Plan East (Polish: Plan Wschód) was a Polish defensive military plan, created in the 1920s and 1930s in case of war with the Soviet Union. Unlike Plan Zachód (Plan West), it was being prepared during the whole Interwar period, as the government of the Second Polish Republic treated the Soviet Union as the greatest potential military threat, capable of initiating a full-scale war. However, a handful of loose historical documents are all that remains of the original Plan East today.


Since its establishment following World War I, the Second Polish Republic had been involved in wars and conflicts with almost all of its neighbors (see: Polish-Soviet War, Polish-Ukrainian War, Polish-Lithuanian War, Greater Poland Uprising, Silesian Uprisings, Border conflicts between Poland and Czechoslovakia). However, of these countries, only two were considered major threats — Germany and the Soviet Union.[1]

During the 1920s and 1930s, the leaders of the Republic focused their efforts on countering the potential threat from the East. Fresh were memories of the Polish-Soviet War and the Battle of Warsaw, which saved both Poland and Europe from the spread of Bolshevik revolution by force.[1][2][3] Both the Polish Army and the government in Warsaw were certain that war with the Soviets was inevitable, thus preparations for it were far more advanced than preparation for armed conflict with Germany. Only after 1935, when Nazi anti-Polish propaganda increased, did the threat posed by Poland's western neighbor become visible enough for Army planners to begin drawing up Plan West. Still, even by 1939, completed fortifications on the Eastern border of Poland vastly outnumbered those in the West.[4]

The interbellum Polish-Soviet border

Poland's shared border with the Soviet Union was 1,412 kilometers long. By comparison, the border with Germany and its province of East Prussia was more than 20 percent longer, at 1,912 km. Neither border contained any major geographical obstacles, making defense very difficult.

In the north there was a flat, plain land with huge forests (e.g. Puszcza Nalibocka — the Wilderness of Naliboki). In addition, a major rail route connecting Moscow to Western Europe extended across the northern portion of the country. The areas major conurbation at the time was Wilno, located in the northeast corner of interbellum Poland.

The centre region of the country was primarily composed of a huge, sparsely populated swamp known as Polesie. This land had no roads and few rail lines. However, it held supreme strategic importance, as its landscape made possible a prolonged, organized defense. Neither Polesie nor the adjacent Volhynia contained any major urban centers.

The south, formerly a portion of the Galicia province of the Austrian Empire, was the most highly developed, with a high density of rail lines, growing industry (e.g., oil fields in Boryslaw), and the well-developed agriculture of Podolia. Lwów, one of the major urban centers of interbellum Poland, was located in this area. In addition, the Soviet border was marked by a natural obstacle — the Zbrucz river.[5]

Virtually all Polish industrial and urban centers were located in the West. This made long-lasting defense possible, as a Soviet force would have taken up to several weeks to reach Upper Silesia, Warsaw, Kraków or Poznań. While devising Plan Wschód, Polish planners assumed cooperation and support would be forthcoming from Romania, which was Poland's main ally in the East.[6]

Eastern border conflicts

The Soviet government undermined the validity of the Riga Peace Treaty, the treaty that had been signed by Moscow in 1921, from the outset. In the early 1920s the Soviets on several occasions organized guerrilla attacks on Polish settlements close to the border. The most famous of these was the attack on Stolpce, which took place on the night of August 3–4, 1924. This event prompted the creation of the Korpus Ochrony Pogranicza (Border Protection Corps). Such attacks continued throughout the 1920s, but reduced in scale during the 1930s, particularly after the signing of the 1932 Soviet-Polish Non-Aggression Pact.[7]

Inception of Plan East

No copy of the plan has been preserved. All that is known are the basic precepts; restoring the whole plan is impossible. Work on the document was completed on February 4, 1939. The plan was based on the notions of Józef Piłsudski, who, until his death in 1935, was sure that war would arrive from the East. Thus most army maneuvers and field fortifications were held in the east, while Poland's western border was, to a large extent, neglected. To this day, some of these fortifications can be seen in the area around Sarny (see Sarny Fortified Area). Bunkers built by Polish Corps of Engineers in the 1930s were used in late 1940s by the Ukrainian Insurgent Army in their guerilla skirmishes with Red Army.

Polish planners were well aware that the Red Army was in many elements superior to their own. Therefore, the main idea was to organize a so-called "resistance in motion", and to try to split Soviet forces south and north of the vast Polesie swamps. Frontline armies, located in the vicinity of the border, were to try to delay the advance of the aggressors and to bleed them, while reserves, located mostly in the area of Brześć nad Bugiem and Lublin, were intended to enter the conflict in later stages. The Poles were expecting the Red Army to advance in three directions. Firstly, along the Minsk - Baranowicze - Białystok - Warsaw rail line. Secondly, along the Sarny - Kowel - Lublin line, and finally, in the south along the Tarnopol - Lwów line.

Structure of the Polish Army in the East

According to Polish historian Rajmund Szubański, in case of war in the East, the bulk of the Polish Army was supposed to have been concentrated both in the north and south, with central section of the border left mostly unguarded. Some military historians claim today that Polish planners placed too many units close to the border, which would have resulted in their total destruction in the opening days of the conflict. In contrast, rear positions were inadequately protected..[8]

Front-line units

Seidner outlines the deployment:[9]

Apart from these units, in all armies there were Border-Area Defence Corps units and garrisons of the main cities.

Reserve forces


The Red Army and its units along the Polish border

In the mid-1930s, the Soviet government started an immense armament program, which resulted in a rapid increase in the number of units. The number of tanks and airplanes along the Polish border grew significantly, and the Soviets enjoyed superiority in all elements. Polish planners anticipated that the Soviets had three times as many soldiers as their own army. The Soviets' superiority in tanks and airplanes was not estimated, but the disproportion was immense. In August 1939 along the Polish border there were likely as many as 173 Red Army infantry divisions (see: Soviet order of battle for invasion of Poland in 1939).

September 1939

On September 1, 1939, Nazi Germany attacked Poland. Consequently, Plan East became void. On September 17, following the Molotov-Ribbentrop Pact, the Soviets broke the Soviet-Polish Non-Aggression Pact by invading Poland. The Red Army met little resistance, as the Polish Army was concentrated in the West, fighting the Germans. Thus, the Soviets managed to occupy Polish Kresy in short order.

See also


  1. 1 2 Stanley S.Seidner, Marshal Edward Śmigły-Rydz Rydz and the Defense of Poland, New York, 1978, chs. 1-2.
  2. According to the British historian A.J.P. Taylor, the Polish-Soviet War "largely determined the course of European history for the next twenty years or more. […] Unavowedly and almost unconsciously, Soviet leaders abandoned the cause of international revolution." It would be twenty years before the Bolsheviks would send their armies abroad to 'make revolution'.
    Ronald Grigor Suny, The Soviet Experiment: Russia, the USSR, and the Successor States, Oxford University Press, ISBN 0-19-508105-6, Google Print, p.106
  3. According to American sociologist Alexander Gella "the Polish victory had gained twenty years of independence not only for Poland, but at least for an entire central part of Europe.
    Aleksander Gella, Development of Class Structure in Eastern Europe: Poland and Her Southern Neighbors, SUNY Press, 1988, ISBN 0-88706-833-2, Google Print, p. 23
  4. Stanley S.Seidner, Marshal Edward Śmigły-Rydz Rydz and the Defense of Poland, New York, 1978, 105-106.
  5. Stanley S.Seidner, Marshal Edward Śmigły-Rydz Rydz and the Defense of Poland, New York, 1978, 108.
  6. Stanley S.Seidner, Marshal Edward Śmigły-Rydz Rydz and the Defense of Poland, New York, 1978, ch. 2.
  7. Stanley S.Seidner, Marshal Edward Śmigły-Rydz Rydz and the Defense of Poland, New York, 1978, chs. 1
  8. Stanley S.Seidner, Marshal Edward Śmigły-Rydz Rydz and the Defense of Poland, New York, 1978, 108-109.
  9. 1 2 Stanley S.Seidner, Marshal Edward Śmigły-Rydz Rydz and the Defense of Poland, New York, 1978, appendices.

Further reading

External links

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