Kharkiv as many other cities in the western part in the USSR was   occupied by the Nazi army in the WWII. It was a big industrial and   populated city in the Soviet Ukraine, and so it was very important for   German army to have it as soon as possible. 
The German troops  entered the city on 25 October, 1941, and the Red  army tried to regain  it several times. Kharkiv remained under the  occupation for a year and a  four months, and at last it was liberated in  February 1943, though,  not for long. It was taken by the enemy soon and  the Soviet army set it  free only in August 23, 1943. This photos show  how was the live under  Nazi in a city, which for some time used to be  the capital of Ukraine.