It then invaded the three Baltics States , including Latvia , in 1940 and in 1941 , the German army invaded Latvia .
The Soviet Union first imposed its demand for military bases on the three independent Baltic nation states in 1939 .
It then invaded the three Baltic   , including Latvia , in 1940 and in 1941 , the German army invaded Latvia .
The Soviet Union first imposed its demand for military bases on the three independent Baltic nation states in 1939 .