Germany's entire territory and sovereignty, stripped from the dissolved Nazi government, placed under joint US/UK/USSR/French administration via the Allied Control Council after the 8 May 1945 surrender.
Ended with the founding of the Federal Republic of Germany (West Germany) on 23 May 1949 and the German Democratic Republic (East Germany) later that year, splitting the occupied zones into two states.
Dedicated scholarly history of Germany's collapse and the onset of Allied occupation in 1945.
Broad but era-defining account of occupied Germany and the wider world at the moment this state began; useful context for the occupation period.