In September 1939, Hitler asked Hungary to allow German forces to transit Hungarian territory in order to speed the German attack on eastern Poland; Hungary's Admiral Miklós Horthy declined permission, on the ground that it would be incompatible with Hungarian honor. On 17 September 1939, pursuant to the Molotov–Ribbentrop Pact and the Gestapo–NKVD conferences, the Soviet Union seized eastern and southeastern Poland and incorporated them into western Ukraine. Upon the Soviet invasion, Poland evacuated its government and substantial army and air units into allied Romania; considerable Polish military were simultaneously evacuated into Hungary, to the west of Romania. The evacuated Polish forces quickly, eluding or escaping internment, made their way west to France, there to regroup and continue the war alongside Poland's western allies.