In the Spring of 1939, Czechoslovakia was broken up into Slovakia - which became a client state of Nazi Germany - and Bohemia & Moravia, a German Protectorate in which German control tightened as time passed.
The ordinary letter below was posted in Bratislava on 31 August 1939 [Poland was invaded on 3 September] and was censored both before leaving [straight line CENZUROVANÉ ] and on arrival in Palestine [pink British censor tape]. There is a mark "bav" which I do not recognise. The pencilled note at the bottom of the cover gives an arrival date of 14 November 1939. As with many covers of this period, a stamp is missing. This is not usually the work of a child peeling off a stamp for a collection. It is the work of a Censor, looking for hidden messages under the stamps [Click on Image to Magnify]: