Киевская область
After the Ukrainian SSR was formed in 1922, Kharkov was declared its capital. Kiev, being an important industrial center, continued to grow. In 1925 the first public buses ran on city streets, and ten years later the first trolleybuses were introduced. In 1927 the suburban areas of Darnytsia, Lanky, Chokolivka, and Nikolska slobidka were included into the city. In 1932, the city became the administrative center of newly created Kiev Oblast.