Following the Oath crisis of 1917 he was interned in Beniaminów, but was released in May 1918 and was allowed to join the Polnische Wehrmacht, at the same time secretly cooperating with the Polish Military Organization.
1917年宣誓危机后，他被囚禁在贝尼亚米努夫，但在1918年5月被释放，并被获准加入波兰军，同时与波兰军事组织秘密合作。