Complex sentence: Pachachi was promptly appointed Iraq's Permanent Representative to the UN in 1959 by the revolutionary regime of Abdul Karim Qassim, during this time Iraq formed a close relationship with the Soviet Union led by Nikita Khrushchev.
Split into simpler sentences: Pachachi was promptly appointed Iraq's Permanent Representative to the UN in 1959 by Qassim's revolutionary regime. During this time Iraq formed a close relationship with the Soviet Union led by Nikita Khrushchev.