After war on 1st March of 1940,
3 victorious countries made an agreement to divide, demilitarize, denazify and reform Germany together.
Poland annexed East Prussia and part of Silesia and established Pomerania , Silesia, Lusatia, Saxony and Brandenburg as puppet states. France established free Rhineland republic and Bavaria.
Meanwhile Britain established Duchy of
Northern Germany.
In theory these states were supposed to bring peace, freedom and stability to German people but it didn't turn that way in each case.
Poland started Polonization on directly annexed lands forbidding German people living in them from using German making their life harder.
In Polish puppet states life was not easier Silesia, Pomerania and Lusatia were forced to use modern versions of Slavic languages used in them thousand years ago. British and French governments were highly against that but after months of argues Polish ambasador only said that "These lands were stolen from Slavic people ages ago and we only show justice to those who remained and were oppressed by German occupiers".
Britain agreed to that because they couldn't lose their buffer zone between west and Soviet union.
French and British officials only recommended moving to other German states saying that life in Polish occupied ones probably won't improve.
French used their zones only as buffer republics giving them freedom and only economic union with France.
Rhineland republic was more mix of French and south German culture than purely German after a few years and Bavaria was more close to re-established Austria with culture than to other German States.
British Duchy of Northern Germany was considered as the most German from them all. Hamburg became biggest city of duchy with no official capital with Germans moving there from Polish occupied parts bringing their culture there.
DNG was Spiritual successor of united German state in the best way it could.
After Nazi Regime was destroyed two countries that existed on the map before it came back.
Austria was back with newly democraticly elected government with Otto von Habsburg elected as new President in hope he will bring old glory to the new republic.
After was also Czechoslovakia came back but not in the same shape as before 1938, it only regained Sudetenland and Slovakia as federal Republic, Germans from Sudetenland were expelled mostly willingly to Bavaria.
Czechoslovakia also accepted Kladsko in exchange for Zaolzie from Poland though  situation in Prague was tense and argue between president and prime minister happened in January of 1941 and it ended up with prime minister saying "Forget about these lands Beneš! Poles at least proposed to give us something, like yes we should talk about on meeting of league of nations but it makes no sense to declare war over these lands, like who's gonna help us? Brits or French? They didn't help us in 1938 Soviets are not trustworthy too so let's just smile and pretend everything is fine.".
Hungary kept southern Slovakia and Carpathian Ruthenia after agreement with Czechoslovak government to not claim anymore lands that belong to new Czecho-Slovak federation.

Meanwhile Italy was only asked to give it's colonial lands to France and Britain after Democratic Reformators overthrown Mussolini's fascist rule ending up with Mussolini escaping to Albania and Italy becoming republic.

Its what ended up as new order of Europe after something that could turn into an Global conflict.