Today in Postal History

This cover is a predecessor to a cover which I posted for January 15.
The sender and addressee are the same.

This is a prisoner of war card sent by a German prisoner
held by the American Expeditionary Force in Vladivostok.

The cover carried no postage as it was marked Prisoner of War Service.
I now believe that this card is Japanese.
It think its use by a prisoner was coincidental.

There is a single U.S. Postal Agency Siberia duplex cancel.

There is a boxed censor stamp:

The return address at the left is
"From german prisoner
of war. Martin Prigge
 prison camp. ameri-
can expeditionary
forces vladivostok
siberia."

The cover was probably addressed to Prigge's wife (or mother?)
in Fallersleben east of Hanover and about 20 km northeast of Braunschwieg.
There are large quantities of records available in the United States Archives
regarding this expedition and in particular, prisoners of war.
You could spend a lot of time searching for family data.

This remains an excellent account of the American Expeditionary Force in Siberia in 1918-1920.
There is some more about the AEF on the January 10th page linked above.
Here is more AEF history.