The act is known as the Act of 5th November.

Other than activism in the field of war relief, Sienkiewicz avoided politics, through shortly before his death he endorsed the Act of 5th November.

In the Act of 5th November 1916, the Kingdom of Poland (Królestwo Regencyjne) was recreated by Germany and Austria on formerly Russian-controlled territory.

The Act of 5th November of 1916 was a declaration of Emperors Wilhelm II of Germany and Franz Joseph of Austria.