I don't know how official this is, but it's from a website called Etranger which seems to have a lot of fan based 2300AD stuff.
The link is:
http://www.users.globalnet.co.uk/~dh...oland/JBPA.htm
The relevant article is:
INTRODUCTION
Poland, circa 2300, is a regional power with a relatively modern, large military. The nation is also surrounded by powerful neighbours, however, and the cornerstone of Polish defence strategy is long-standing and close alliance with the nations of France and Czechoslovakia. For most of the post-Twilight War era, France and Poland have had a close, albeit sometimes rocky, relationship, with the French looking to Poland (and Czechoslovakia) as a stabilizing force in central/eastern Europe and as a potential counterbalance against the German states, Russia, and the Ukraine, with more than a little success along these lines. Under French tutelage, Poland has managed to recover from the Twilight War and prosper. As a consequence of this long association, the Polish Army has been heavily influenced by the French military in terms of organization, equipment and doctrine.
HISTORY
The Twilight War and the 21st Century: Poland was among the most devastated regions of the world at the end of the Twilight War, and what remained of its army, at the beginning of the 21st Century, was a scattering of local warlords and city militias. The first thirty years of the 21st century were spent in a multi-faceted civil war, with the most important factions being the oligarchs of the city-state of Krakow in the south and a coalition of populist militias and stranded American and Canadian forces in the north. Besides fighting each other, these factions were also pre-occupied with dealing with Soviet military units still in the country (by incorporating the more agreeable, and destroying the more hostile) and the remnants of the Polish communist government in Lublin.
In 2026, the French managed to broker an agreement between Krakow and their northern rivals, forming a democratic National Assembly. The National Assembly's first acts were to form the Polish National Army, elect a prime minister, and begin framing a new constitution (in that order). In short order, French aid began to flow into Poland (including military equipment and advisors). The Polish Army, well-equipped compared to their rivals, had little trouble reasserting national unity and integrity in the "War of National Rebirth" (loosely from 2000 onward, more properly 2026-2033).
Ongoing chaos in the Baltic led to the Polish Army occupying Lithuania and Kaliningrad in 2037, with Lithuania (including Kaliningrad) being politically and economically incorporated into Poland as an autonomous province over the course of the next 30 years. A multi-national French, Polish, and Swedish force also briefly occupied Leningrad/St. Petersburg during the 2040s (2042-4) before internal bickering between the Swedes and French, coupled with resurgent Russian nationalism, forced the evacuation of the force.
The Polish Army nearly doubled in size during the Russo-Ukrainian War (2065-2072), dispatching a large expeditionary force to support the Ukrainians as well as launching an invasion of Russia in conjunction with Bavarian and French forces. The invasion enjoyed some initial success (Minsk fell in 2067) but stiffening Russian resistance put the Poles and their allies on the defensive, and long term disaster may have been averted only by the entry of Japan into the war in 2070.
The Polish Army spent the remainder of the century as part of a multi-national force occupying portions of European Russia (including St. Petersburg, again, which was under Franco-Polish administration until 2093). French insistence that these forces be withdrawn at the turn of the century became a lingering source of friction between the Polish and French governments (the Poles were, at the time, contemplating outright annexation of very large tracts of European Russia).
The 22nd Century: Tensions with Russia simmered just below the level of open hostility for much of the century, with a number of border "incidents," some involving battalion and brigade level cross-border raids and artillery duels. French diplomatic pressure (applied heavily on both sides) managed to keep full-scale war from breaking out, however.
In 2162, Poland fought a limited war against the German state of Brandenburg, stemming from a longstanding dispute between the two nations concerning the fate of the city of Szczecin/Stettin, which had come under the control of Brandenburg at the beginning of 21st century. The war erupted after a pro-Polish demonstration (proven, some years later, to have been instigated by allegedly "rogue elements" within the Polish secret service, which had long been engaged in attempts to undermine Brandenburg rule in the city) turned bloody, prompting Poland to dispatch forces to the border. Brandenburg matched the Polish deployment and a confused night action took place some days after the demonstration, with both sides accusing the other of firing first.
Two weeks of bloody fighting in and around the city of Stettin followed, with an attendant flow of refugees out of the city (as well as the displacement of ethnic Germans from the eastern bank of the Oder). Occurring at the height of the Alpha Centauri War, the "Stettin War" (or "Szczecin War" depending on one's perspective) was quickly terminated by diplomatic pressure from France and Bavaria, and resulted in little, save the devastation of the city of Stettin. The Polish-Brandenburg border remained fixed on the line of the Oder-Niese rivers, and Stettin remained a "lost" city as far as the Polish government was concerned. The most notable outcome of the war was the flow of ethnic Polish refugees out of the city into Poland (with ethnic Germans retreating from Stettin and the east bank of the Oder into Brandenburg), so that by the end of the century, Stettin's population was overwhelmingly German, ultimately solving the "Stettin Question" through demographic transition rather than diplomacy or armed might.
As a final note, Polish refugees from the city of Szczecin were assisted in resettlement by the Zapamoga organization, with a great many eventually immigrating to Provence Nouveau and Wellon on Tirane (along with a great many other Polish nationals). Displaced Brandeburg Germans from Stettin and the Oder area played a large part in rebuilding Stettin, though a sizeable minority also emigrated to Tirane.
For the remainder of the century tension remained high along the border, with two near-wars averted in 2170 and 2191 by Bavarian and French diplomatic manoeuvring.
The 23rd Century: The Polish Army contributed the I Polish Expeditionary Corps to the Central Asian War, where they fought under French command. The expeditionary force suffered heavy casualties (stemming from the same shortcomings in doctrine and equipment that hampered the French war effort in general), and popular support for the war in Poland rapidly evaporated. As a result, the ruling Liberal Solidarity party suffered serious losses to the anti-war Unity party in the 2288 elections.
The Unity Party limited Polish participation in the War of German Re-Unification to a strongly worded diplomatic protest. The potential threat of of Polish belligerence, however, did serve to limit the force Germany could deploy against France. The diversion of troops is believed (by the Poles, at any rate) to have been crucial to French victory in the Battle of Picardy which halted the Germans along the Somme.
German reunification proved as volatile a political issue as the Central Asian War had been and the Unity Party's government did not survive long after the announcement of a German state, suffering heavy losses to a resurgent Liberal Solidarity party in emergency elections called in 2294. Liberal Solidarity has made reconciliation with France and military readiness the central tenets of their renewed government. While there is some lingering ill-will among French government officials concerning the failure of Poland (and the Czechs) to aid France during the war, most French citizens regard the War of German Reunification as stemming more from the folly and ineptness of the ruling military Junta.
The Kafer War: The Liberal Solidarity party offered Polish forces to assist in the defence of human space against the Kafers as early as 2299 (as a side note, participation in the war is in part a bid to secure French aid in establishing a Polish colony in the French Arm). Preparations (both diplomatic and military), as well as the scarcity of transport, delayed the deployment of Polish Forces until after the Battle of Beowulf in 2302. For more information, see II Polish Expeditionary Corps.