 Complete the following phrase:  After the outbreak of the war, Olszyna-Wilczyńskis unit was to prepare the defense of the area between Biebrza River, Suwałki, and Wizna. However, due to German breakthrough in Lesser Poland the Operational Group was disbanded and its units withdrawn to Lwów, where they later took part in the battle for that city. Olszyna-Wilczyński himself escorted his units to Pińsk, where he met with Marshal of Poland Edward Rydz-Śmigły. After the 