Google Maps (and others) are incredibly useful for a T2000 Poland campaign. But there’s a problem: Anachronisms.
Post Cold War Poland has been prosperous, and on a building spree, particularly since EU membership in 2004. Many things have been built that would not exist in 1996 still-Soviet-Bloc Poland: Buildings, bridges, highways.
Example: Sandomierz on the Vistula River. The bridge span on the right was built ’08-’11. So, in my Battle of Sandomierz, I blotted it out.
Google Earth has a “roll-back-time” function, but the satellite images degrade quickly the farther back you go.
Check out this map from the site, showing Poland’s size versus the East Coast of the USA.