How did hitler and stalin both have territorial claims to poland

Nazi Germany and the USSR had signed an agreement on Military neutrality and splitting Poland between each other. This non-aggression pact was called the "Molotov-Ribbentrop Pact." Which was signed a few days before the invasion of Poland.

the american rail road was the most influential and useful transportation system developed in the 1800's with steam locomotives and in the very late 1800's and early 1900's diesel electric locomotives being used to transport goods and people around the newly expanded united states!