There were different kinds of regiments, such as the regulars, dragoons, and reiters. In 1631, the Russians created two regular regiments in Moscow. During the Smolensk War of 1632–1634, six more regular regiments, one reiter regiment, and a dragoon regiment were formed. Initially, they recruited children of the landless boyars and "streltsy", volunteers, Cossacks and others. Commanding officers comprised mostly foreigners. After the war with Poland, all of the regiments were disbanded. During another Russo-Polish War, they were created again and became a principal force of the Russian Army. Often, regular and dragoon regiments were manned with "datochniye lyudi" for lifelong military service. Reiters were manned with small or landless gentry and boyars' children and were paid with money (or lands) for their service. More than a half of the commanding officers were representatives from the gentry. In times of peace, some of the regiments were usually disbanded.