context: The Czechoslovak side was led by Josef Šnejdárek. Czechoslovak military forces had been formed from the three legionary battalions of the 21st Shooting Regiment from France, the 54th Infantry Battalion of Olomouc, the 93rd Infantry Battalion of Fryštát, a volunteer battalion from Bohumín and a volunteer Battalion from Orlová. The operations of the Czechoslovak forces were joined by other local volunteers, formed in the National Guard approximately 5,000 men strong. From the north-west of Slovakia came the main force that was sent to support the 35th Legionary Regiment from Italy, led by the Italian Colonel Graselli and later reinforced with the Shooting Legion Regiment from Italy. During the war the Czechoslovak army was reinforced by the newly formed 2nd Brigade with a strength of six battalions, with the support of two artillery batteries, and one cavalry squadron. The Czechoslovak army was further strengthened by the 1st Battalion of the 28th Infantry Regiment, 1st Btn. of the 3rd Infantry Reg., 2nd Btn of the 93rd Infantry Reg. and 5 volunteer battalions. Polish forces under the command of Franciszek Latinik were weaker than the Czechoslovak forces. At the end of World War I, Poland was fighting in border disputes with all its neighbors, and during the war with Czechoslovakia the main force was committed to the fighting in Eastern Galicia with the Ukrainians. The Polish forces were composed of five infantry battalions supported by four machine gun companies, a cavalry platoon and an artillery battery. Other forces included approximately 550 members of the gendarmerie and around 6,500 local Polish volunteers. Polish forces were reinforced during the war.
question: Which battalions formed the Czechoslovak military forces?
answer: 21st Shooting Regiment