Well depends on what route you would take but the shortest country crossing route from US to poland is 3 countries
Through france then germany and then poland but how the americans in ww2 got to poland is traveling through 9 countries in a wide range
France, Belgium, Netherlands, Switzerland, Italy, Germany, Austria, Czech Republic and slovakia but of course they did had help from the british
if you fly/drive north, you'd pass the country of Slovakia, which was once part of czechoslovakia, but became an independent country on jan. 1st, 1993
Poland
Slovakia
Slovakia borders Poland, Ukraine, Hungary and Czech Republic.
Poland didn't exist in WWI. The Polish speaking peoples were split between Austria-Hungary, Russia and Germany.
The leaders in Poland and Hungary both wished to follow a different path to socialism.
Poland and Hungary
Poland.
Hungary, Poland and Belarus all border the Ukraine.
Hungary and Germany.
Many are Christian or Catholic, but not all are. The country of Poland and Hungary are best friends and they celebrate a friendship day between the two countries.
Hungary, Slovakia and Poland are to the west of Ukraine.
Austria-Hungary
Finland
Hungary, Slovakia and Poland are to the west of Ukraine.
No Hungary is on the South of Poland
There is no country between Sweden and Poland. They are separated by the Baltic Sea.
Switzerland Poland Romania Hungary
Slovakia