Question: The Dachau Trials and the division of Germany happened due to what?

Context articles: Busan Subway fire
Dachau trials
Ludwig Eiber
Dora Trial
Dachau concentration camp
Buchenwald Trial
Jürgen Stroop
Dachau trials (Slovenia)
Allied-occupied Germany
Edwin Katzen-Ellenbogen

The Busan Subway fire refers to the fire that happened on July 16, 2014 in Busan, South Korea.
 The fire happened at the City Hall Station at 5:41 p.m. during which 5 people were injured and 400 more were evacuated.
 According to the Korean police, the fire happened due to faulty wiring which linked air conditioner to the external power supply.
 The Metro began operating again as normal by 6:55 p.m.
The Dachau trials were held for all war criminals caught in the United States zones in occupied Germany and Austria, as well as for those individuals accused of committing war crimes against American citizens and its military personnel.
 The trials, which were held within the walls of the former Dachau concentration camp, were conducted entirely by American military personnel whose legal authority had been conferred by the Judge Advocate General's Department within the U.S. Third Army.
Ludwig Eiber (born 1945) is a German historian and author.
 He is widely acknowledged as an expert on the post-World War II Allied war crimes trials of the Nazis.
 In particular, he has expertise in the Dachau trials.
The Dora Trial, also the "Dora"-Nordhausen or Dachau Dora Proceeding (German: "Dachau-Dora Prozess" ) was a war crimes trial conducted by the United States Army in the aftermath of the collapse of the Third Reich.
 It took place between August 7 and December 30, 1947 on the site of the former Dachau concentration camp, Germany.
 In the proceedings, officially known as the "United States of America vs. Kurt Andrae et al." (Case 000-50-37), 19 men were accused of war crimes committed in the operation of the Mittelbau-Dora concentration camp, its many subcamps, and the Mittelwerk armaments plant located near Nordhausen, Germany.
 The main trial ended with 4 acquittals and 15 convictions, including 1 death sentence.
 Dora was the last of a sequence of proceedings which took place in the context of the Dachau Trials relating to wide-ranging war crimes uncovered by the United States in its zone of occupation at the end of World War II.
 Those convicted in the Dora Trial served their sentences at Landsberg Prison.
Dachau concentration camp (German: "Konzentrationslager (KZ) Dachau" , ] ) was the first of the Nazi concentration camps opened in Germany, intended to hold political prisoners.
 It is located on the grounds of an abandoned munitions factory northeast of the medieval town of Dachau, about 16 km northwest of Munich in the state of Bavaria, in southern Germany.
 Opened in 1933 by Heinrich Himmler, its purpose was enlarged to include forced labor, and eventually, the imprisonment of Jews, German and Austrian criminals, and eventually foreign nationals from countries that Germany occupied or invaded.
 The Dachau camp system grew to include nearly 100 sub-camps, which were mostly work camps or "Arbeitskommandos ", and were located throughout southern Germany and Austria.
 The camps were liberated by U.S. forces on 1 May 1945.
The Buchenwald Trial or United States of America vs. Josias Prince of Waldeck et al. (also referred as Case 000-50-9) was a war crime trial conducted by the United States Army as a court-martial in Dachau, then part of the American occupation zone.
 It took place from April 11 to August 14, 1947 in the internment camp of Dachau, where the former Dachau concentration camp had been located until late April 1945.
 In this trial, 31 people were indicted for war crimes related to the Buchenwald concentration camp and its satellite camps, all of whom were convicted.
 The Buchenwald Trial was part of the Dachau trials, which were held between 1945 and 1948.
Jürgen Stroop (born Josef Stroop, 26 September 1895 in Detmold, Germany – 6 March 1952 in Warsaw, Poland) was an SS General during World War II.
 He was in command against the Warsaw Ghetto Uprising and wrote the Stroop Report, a book-length account of the operation.
 Following the defeat of Nazi Germany, Stroop was prosecuted during the Dachau Trials and convicted of murdering nine American POWs.
 After his extradition to the People's Republic of Poland, Stroop was tried, convicted, and hanged for crimes against humanity.
The Dachau trials (Slovene: "Dachauski procesi" ) in Slovenia were a group of show trials held between 1947/48 and 1949.
 The name refers to the fact that 31 of the defendants had been prisoners at the Dachau concentration camp.
Upon the defeat of Nazi Germany in World War II, the victorious Allied powers asserted their joint authority and sovereignty over 'Germany as a whole', defined as all territories of the former German Reich which lay west of the Oder–Neisse line; having declared the extinction of Nazi Germany at the death of Adolf Hitler (see 1945 Berlin Declaration).
 The four powers divided 'Germany as a whole' into four occupation zones for administrative purposes, creating what became collectively known as Allied-occupied Germany (German: "Alliierten-besetztes Deutschland" ).
 This division was ratified at the Potsdam Conference (17 July to 2 August 1945).
 In autumn 1944 the United States, United Kingdom and Soviet Union had agreed on the zones by the London Protocol.
 The powers at Potsdam approved the detachment from 'Germany as a whole' of the German eastern territories east of the Oder-Neisse line; with the exact line of the boundary to be determined at a final German Peace Treaty.
 This treaty was expected to confirm the "shifting westward" of Poland's borders (back to approximately as they were before 1722), as the United Kingdom and the United States committed themselves to support there the permanent incorporation of former eastern German territories into Poland and the Soviet Union.
 In the closing weeks of fighting in Europe, United States forces had pushed beyond the agreed boundaries for the future zones of occupation, in some places by as much as 200 mi .
 The so-called line of contact between Soviet and American forces at the end of hostilities, mostly lying eastward of the July 1945-established inner German border was temporary.
 After two months in which they had held areas that had been assigned to the Soviet zone, U.S. forces withdrew in the first days of July 1945.
 Some have concluded that this was a crucial move that persuaded the Soviet Union to allow American, British and French forces into their designated sectors in Berlin, which occurred at roughly the same time (July 1945), although the need for intelligence gathering (see Operation Paperclip) may also have been a factor.
Edwin Maria Katzen-Ellenbogen was a Nazi physician in the concentration camp of Buchenwald.
 In the Buchenwald Camp Trial (part of the Dachau Trials) he was sentenced to lifetime imprisonment (later modified to 15 years of imprisonment).