Hi Guys and Merry Christmas!
I was bit busy recently, but Old Crow called me out. So...basically Polish army was growing, naturally since the end of World War I in November 1918, but it was a process. I found some graphic that would show it precisely:

- Polish Army1919.png (187.21 KiB) Viewed 1859 times
As you can see, initially it was very low on numbers, mostly improvised units. In the east it was so called "self-defence units", but they were on a size of regiments. In other part of Poland they were formed from Polish Military Organization (conspiracy structure inside German and AH-armies, waiting for the time to start uprising).When Bolsheviks started to advance in the beginning of 1919 (Lenin gave the order to Red Army to go to reach former Russian Empire borders it was met but those improvised units. However, those units were on high morale, because everybody were drunken with freshly regained independence. Józef Piłsudski(who was appointed supreme commander) ordered to attack the Reds, who had numerical superiority, but were poorly supplied and commanded. Therefore enthusiastic Poles easily took Minsk, Wilno in spring 1919.
In spring 70k General Józef Haller's Blue Army came from France, fully equipped and trained, even with Tanks, which were used in February 1920 to retake Dyneburg from Bolsheviks together with Latvian forces.
In June those units were reinforced by "Wielkopolska" Army, units which were fighting Germans in Poznan region (So called Greater Poland). It is not a coincidence, because those units couldn't leave Poznan, until Germans signed up Treaty of Versailles in June 1919, and Poland’s western border was officially recognized by Entente and Germans themselves. If Polish troops leave what they took in Wielkopolskie uprising in winter 1919, Germans would be more than happy to unleash the Freikorps and took it back. So in game those troops should be available let's say in July, after Poland’s western border was guaranteed by France. Another Polish division was in Odessa since spring 1919, this was Division that were fighting on the Russian side against the Germans, but after Revolution it started its journey from Kuban to Europe, where finally the French gave it a lift by sea to Odessa, from where it travelled by rail to Poland and was renamed as 10th division.
Later in the year Polish Army started to grow organically, because when those units came to Poland they needed logistics, barracks, depots etc. It reached 600k in the end of 1919. Also France was already delivering some equipment in that year so artillery started to appear in considerable amounts.
Conclusion: Poles should get new units gradually, in stages:
0.Basic infantry units, those insurgents in eastern Poland, infantry and cavalry.
1. Blue Army[trained and equipped in French way] beginning of April 1919(historically they deb-locked Lvov which was under siege by Ukrainians, defended by polish volunteers).
2. After Germans sign the treaty of Versailles, Wielkopolska Army (trained and experienced, German way, it had air force, from the planes taken over during uprising on the german airfields around Poznan]; 4th Division in Odessa [trained and equipped in Russian style].
3. If you want to add some flavor in December 1919 Kosciuszko air Squadron recruited from American volunteers was formed. It was commanded by future King-Kong director(no kidding), Merian Cooper. So you can give Poles additional to this basic Wielkopolska air squadron another one (Poles were developing air force anyway, Americans were just assisting, but still flavor unit for me. Not all Americans went home for bbq in mid-1919).
4. Poland would also have a Volunteer Army trigger - If Bolsheviks will approach heartland Poland: for example 7 hexes from Warsaw or Cracow, Poland should receive Volunteer units (in history there were more than 100k infantry and cavlary) and additional help from Entente (MPP's ammo, supplies etc., maybe free artillery unit) France and UK send this help not from their love to Poland, but just from geopolitical reasons, they simply didn't want Bolsheviks to reach Germany. Anyways this help was significant.
5. Poland should have tank unit, because, however it would sound crazy to you, because of Haller's army, Poland in 1919 was 4th tank power of the...world(sic!), with staggering number of 120 Ft-17. I mean, if white Russians have a unit Poland should have it too, and more advanced (Ft-17 were high-tech for 1919 reality)
As for Poles going on Moscow: Just after regaining independence there was a debate between tow main political sides, how future Poland should look like. Piłsudski advocated for going East and form alliance with independent Ukraine Belarus and Baltic States, to geopolitical block Russia. So he opted Polish borders could go to previous Polish borders from 1772. Nationalists with Dmowski claim that's wrong idea, because Poland would have to much minorities and it will actually harm the new country, and provoke internal conflicts. Basically Poles agreed for Lvov and Vilnus to be Polish, but not for Kiev or Smolensk. Minsk was as far as some people tolerated. In south Galicia, Volhynia, part of Prypet Marshes. So there should be definitely a morale penalty against going too much east, because when Piłsudski in 1920 actually attacked on Kiev, nationalists started press campaign all over country and protested in parlament etc. They called Piłsudski a Napoleon, sick tyrant, accusing him he is a protestant/jew/Austrian agent, you name it. He wasn’t but it was the fact, that going east was very unpopular among the National Party, and soldiers from Western Poland.
Poland could even get desertion events, when crossing some line east.
But it works both ways, when facing danger in 1920, Poles formed Government of National Defence and in September 1920 Polish Army was around 900k... So as I said volunteer units, maybe morale boost event, and MPP’s from entente.
Just my thoughts
What do you guys think?
Cheers
Jazon