During World War I, in 1915 the area was occupied by the Central Powers and in 1917 Russia ceded all Polish territories it possessed to the German Empire and Austria-Hungary.
I the area was occupied by the Central Powers. This was in 1915. This was during World War. I Russia ceded all Polish territories. This was in 1917. This was during World War. It possessed all Polish territories to the German Empire. It possessed all Polish territories to Austria-Hungary.