The Danube Host included volunteers from various groups, such as the Nekrasov Cossacks, Romanians, Serbs, and Bulgarians.

In 1839, Russia, concerned about the extent of local Romani activity, proposed that Roma be drafted as Cossacks.

[1] During the Crimean War, the Danube Cossacks became famous for using rocket artillery in the capture of Tulcea, Isaccea and Măcin.

As a result, the Host moved to Stanitsa Nikolayevka-Novorossiyskaya (a modern selo within Odesa Oblast, Ukraine).

Over the next decade, however, during a period of relative peace, most lost their combat skills and became involved in internal customs and police work.