been taken by Poland by the Riga Treaty with Lenin-led Soviet Russia during the Russian Civil War in 1921.) In a short and victorious campaign, the Soviet Union attacked Poland on September 17, 1939; the Poles had already been fighting off the German invasion since September 1. Krivoshein held command of the 29th Light Tank Brigade within the 4th Army of Vasily Chuikov. As Poland's leaders had by then concentrated their forces in the west and the Polish command had decided to offer only minimal resistance in the east in order to better meet the devastating attacks of Nazi Germany's advances against western Poland and the rapid German drive towards Warsaw, whose siege had already begun on September 16, just prior to the start of the Soviets' strike on the following day, the campaign passed relatively uneventfully for the troops until joining up with the Germans at Brest-Litovsk. Within two weeks the Soviets took more than 250,000 Polish prisoners of war. The quick advance of the German army had taken some elements of the German forces beyond the agreed-upon demarcation line between the Germans and Soviets, the two armies coming face-to-face against each other just east of the Bug River. The encounter was unexpected, and the German and Soviet forces scuffled in minor attacks and counterattacks against one another along the Bug region. Upon penetrating the Bug region toward the city of Brest-Litovsk, Krivoshein found that the German troops had already occupied the town ahead of the advancing Red Army, and was invited by a party of German officers to the German headquarters to share breakfast with their commander, General Heinz Guderian. Krivoshein agreed, and following a brief talk, the German troops agreed to withdraw west to the previously-agreed demarcation line and hand the city and its fortress to the Soviet forces. During the meeting, Guderian proposed a joint parade of Soviet and German troops through the town, including a lineup of soldiers from both armies on the central square. Krivoshein declined, noting the exhaustion of the Soviet troops after a protracted march, but promised to supply a military band and a few battalions to accompany the parade of the withdrawing German troops, and agreed to Guderian's request that he and Guderian would stand and review the ceremony together. (Various Western historians and some Russian writers refer to this as the German-Soviet military parade in Brest-Litovsk.) Krivoshein's next tour of