 Complete the following phrase:  In mid-February 1920, the regiment was loaded on a train, and was transported to Wilno, where its name was changed into the 17th Greater Poland Uhlan Regiment. On March 12, Colonel Witold Zychlinski was named its commandant, and after a two-week training, the unit was transported to the frontline along the Berezina river. In mid-April 1920, it was transported to the Ukraine, to support Polish forces in the 