<Li> After World War I, in the Treaty of Versailles, a part of Germany designated "the Polish corridor" was given to the new Second Polish Republic, for access to the Baltic Sea . This gave Poland a short coastline, but without a large harbour . This was also the pretext for making Danzig (now Gdańsk) with its harbour the Free City of Danzig, to which Poland was given free access . However, the Germans placed obstacles to this free access, especially when it came to military material . In response, the small fishing harbour of Gdynia was soon greatly enlarged . </Li> <Li> Until the dissolution of Austria--Hungary in 1918 at the end of World War I, Austrians, Hungarians and that empire's other nationalities had served in that country's navy, but since then, Austria and Hungary have both been landlocked countries . </Li> <P> Countries can make agreements on getting free transport of goods through neighbour countries: </P> <Ul> <Li> The Treaty of Versailles required Germany to offer Czechoslovakia a lease for 99 years of parts of the ports in Hamburg and Stettin, allowing Czechoslovakia sea trade via the Elbe and Oder rivers . Stettin was annexed by Poland after World War II, but Hamburg continued the contract so that part of the port (now called Moldauhafen) may still be used for sea trade by a successor of Czechoslovakia, the Czech Republic . </Li> <Li> The Danube is an international waterway, and thus landlocked Austria, Hungary, Moldova, Serbia, and Slovakia have secure access to the Black Sea (the same access is given to inland parts of Germany and Croatia, though Germany and Croatia are not landlocked). However, oceangoing ships cannot use the Danube, so cargo must be transloaded anyway, and many overseas imports into Austria and Hungary use land transport from Atlantic and Mediterranean ports . A similar situation exists for the Rhine river where Switzerland has boat access, but not oceangoing ships . Luxembourg has such through the Moselle, but Liechtenstein has no boat access, even though it is located along the Rhine, as the Rhine is not navigable that far upstream . </Li> <Li> The Mekong is an international waterway so that landlocked Laos has access to the South China Sea (since Laos became independent from French Indochina). However, it is not navigable due to the Khone Phapheng Falls . </Li> <Li> Free ports allow transshipment to short - distance ships or river vessels . </Li> <Li> The TIR Treaty allows sealed road transport without customs checks and charges, mostly in Europe . </Li> </Ul>

The only landlocked country among the following in south east asia is