sentences:  A Polish communist regiment, the "Red Regiment of Revolutionary Warsaw" () made up its cadre, and in the beginning it was mostly composed of Polish volunteers.According to its order of battle (below) each of its brigades consisted of two battalions of infantry and one battalion of cavalry.During the Polish-Soviet War it was part of the Western Army from November of that year, and it fought against the Lithuanian and Belarusian Self-Defence units and later the Polish Army of the newly created Second Polish Republic in the opening phase of the Polish-Soviet War.