Despite some Polish successes in minor border battles, German technical, operational and numerical superiority forced the Polish armies to retreat from the borders towards Warsaw and Lwów.
A pesar de que algúns polacos tiveran éxito en zonas fronteirizas menores, a superioridade técnica, operacional e numérica dos alemáns forzaron aos polacos a retroceder cara Varsovia e Lwów.