In 1936, the Uzbek SSR was enlarged with the addition of the Karakalpak ASSR taken from the Kazakh SSR in the last stages of the national delimitation in the Soviet Union. Further bits and pieces of territory were transferred several times between the Kazakh SSR and the Uzbek SSR after World War II.
The Uzbek Soviet Socialist Republic underwent expansion in 1936 with the inclusion of the Karakalpak Autonomous Soviet Socialist Republic, which was previously part of the Kazakh Soviet Socialist Republic during the final stages of boundary realignment in the Soviet Union. Post-World War II, additional territories were transferred between the two republics.