After learning that 14 relatives including his grandmother had been murdered in the
Auschwitz concentration camp and attending a lecture on
Zionism, Lenart decided to volunteer for
Sherut Avir, the precursor to the
Israeli Air Force. He took part in the clandestine smuggling of salvaged Czech-supplied warplanes to Palestine shortly before Israeli independence, flying them past the British blockade. He became a fighter pilot following the
Israeli Declaration of Independence and the outbreak of the
1948 Arab-Israeli War, flying the
Avia S-199 fighter plane. On May 29, 1948, Lenart took part in
Operation Pleshet, when the Israeli Air Force launched its entire fleet of four fighter aircraft in a desperate attempt to halt an Egyptian advance on
Tel Aviv, in coordination with a ground counterattack. This was the first use of Israeli fighter planes in combat, and Lenart, the most experienced of the pilots, commanded the mission. Although the attack was highly disorganized and did minimal damage, it had a profound psychological effect on the Egyptians, who had been assured that the Israelis had no aircraft. The Egyptian forces subsequently halted their advance and retreated. ==Later life==