Mordechai Tenenbaum

It was then decided, that with the start of an action by the Germans to "liquidate" the ghetto, the resistance would fight in the streets of Białystok, before attempting to escape to the forests, and continue operating as underground partisans. The Ghetto underwent a number of major operations during 1943, and members of the underground who remained there, felt that they were the last fighters, following the liquidation of the ghettos in Warsaw in Będzin and Częstochowa.

Armed with only twenty-six rifles, one machine gun, roughly one hundred pistols, and several Molotov cocktails, the resistance forces were severely under-equipped, compared to the SS battalion against them. On the night of August 15, 1943, the Germans began to encircle the ghetto as the uprising began. During the uprising, Tenenbaum and his comrades fought for five days against the German forces, rupturing Wehrmacht supply lines, and succeeding in diverting German soldiers and military police groups from the East. This would help allow the Red Army to march westwards to Poland.

This borrowed identity allowed him more free movement, including all territories under Nazi control. Even after the Nazi invasion of the Soviet Union, (including Lithuania), Tenenbaum made many forged papers for friends and loved ones, that allowed them to elude and escape the Schutzstaffel. In 1942, he arrived in Warsaw, where he was one of the founders of the YKA, and among the organizers and planners of the Warsaw Ghetto Uprising.

In November 1942, Tenenbaum went on a mission to Białystok, intending to serve as the head of the Haganah movement. There, he organized the Jewish underground fighters, and headed the local resistance movement, which included members of Hashomer Hatzair and Dror.

In Vilna, under Soviet occupation (1940–1941), he continued to work to save Jewish youth, by providing them with certificates. Tenenbaum himself had a forged identity card in the name of a "Tatar" from the Vilnius region, named Tamaroff, a family name that also mentioned the name of his girlfriend, Tema Schneiderman.

Mordechaj Tenenbaum was born in Warsaw, one of 7 children to an Orthodox-Jewish family. From an early age, Tenenbaum abandoned the religious lifestyle, along with one of his brothers, and became interested in secular culture. After graduating from the Hebrew high school "Tarbut” in Warsaw, he studied Turkish and Semitic languages, at the University of Warsaw. Active in Zionist youth circles since his childhood, Tenenbaum joined the Poale Zion youth movement in 1935.

Mordechai Tenenbaum (Hebrew: מרדכי טענענבוים; 1916–1943) was a member of the Jewish Combat Organization (Żydowska Organizacja Bojowa) and leader of the Białystok Ghetto Uprising.