Nazi Germany invades Poland in 1939 but there is a twist. This is modern Poland.
Poland isn't 1939 Poland... its suddenly replaced magically by 2019 Poland with 2019 Polish military forces, technology, economic production and so forth with the 2019 Polish population.
Please consider two rounds of this:
Round 1:
Nazi Germany (and nearby Axis allies) vs Modern Poland; Poland has no allies or aid at all
Round 2:
Nazi Germany + Soviet Union + nearby Axis allies vs Modern Poland (in this Round Poland DOES receive economic, but no military aid from the Western Allies)
Please offer your opinion on the outcomes of Round 1 and Round 2 and justify/support your opinion.
Note that in Round 1, it is assumed that the Soviet Union and all Western Allies stay out of the war. It's also assumed in both rounds that no country will enter the war directly to fight with Poland. Remember that in the 1930s Germany has 80 million people while 2019 Poland has some 30-40 million; however, Poland has modern weapons (albeit it starts with a small army, what it has fielded and ready today).