Europe of the
Stettin-TL with former Iron Curtain in yellow.
As you can see, in this TL the borders between Austria and the Czech Republic are different, because after WWI German Austria and Czechoslovakia agreed to draw the borders approximately along the linguistic boundary in both southern Bohemia and southern Moravia. Furthermore German Austria could keep the German-speaking areas in OTL Slovenia, including Marburg an der Drau (slov. Maribor). But in exchange Austria had to concede Felsőőrvidék/Burgenland to Hungary and Austria had to stay completely neutral. In the 60s, Italy got a very left-wing government, which decided to hold a plebiscite in South Tyrol about its future belonging to either Italy or Austria. More than 90% voted for Austria. So at the end of the 60s, South Tyrol got officially ceded by Austria. Since that event, the Italians never trusted left-winged parties anymore.
After WWI, the treaty of Trianon was a bit fairer to Hungary. Hungary could not only keep Felsőőrvidék, but also the Hungarian majority-Felvidék (OTL southern Slovakia), the border with Roumania got drawn a little more eastern, so that Nagyvárad (Oradea) stayed within the Hungarian borders, as well as the northern third of Vajdaság (Voivodina) including Szabadka and Zombor and the Muravidék with Muraszombat.
The borders of Turkey have also been drawn differently after the first world war - especially it could keep less of eastern Thracia.
After WWII, Germany had to cede the counties (Landkreise) of Glatz and Halberschwerdt, as well as a few villages south of Leobschütz (Głubczyce) and Katscher (Kietrz) to Czechoslovakia. Also after WWII, the Italian city of Triest has been given to Yugoslavia.
Within the Soviet Union, the borders between the SSRs (at least in Europe) have been drawn differently, more or less based on more historical borders, but "amended". The Moldavian SSR has an actual coast here. Crimea has also never been given to the Ukrainian SSR. A Kertch brigde was build in the late 70s already.
The Nagorno-Karabakh conflinct went off very differently, making Azerbaijan the "bad guys" here, who began all the thing. Armenia is much more victorious than in OTL - also getting (secret) little help from both Greece and Iran. Armenia fully annexed Nagorno-Karabakh and the Link in 1994. Nakhichevan became something like an Armenian puppet state. Since Armenia is closely allied with Russia, Azerbaijan officially gave up its claims in 2009. Turkey never intervened in the conflict and also never officially allied with Azerbaijan, because it feared a war with Russia as a result.
Cyprus never got invaded by Turkey after the Brits left the Island.
Belarus envolved to a typical former-east bloc-republic like Poland, Hungary, Czech Rep., Lithuania, etc. - Lukanshenko didn't become president in 1994 (nor later). Belarus joined EU in 2008, but other than its western neighbours, Belarus didn't join NATO.
Ukraine envolved very similar to OTL until 2013, but with failed Euromaidan. Since then, the country driftet into a (isulated) dictatorship, similar to OTL Belarus. But here, Yanukovych('s Ukraine) is not backed by Russia. At least not very much.
After its independence, Moldavia very soon (in 1992) became a socialist dictatorship by coup. In 2004 - after massive countrywide protests - elections were hold and Moldavia became a western-orientated democracy. The Russian-speaking Transnistria became an autonomous area within Moldavia. The cyrillic alphabet stayed official and a reunion with Romania was rejected.
In late 2004, Vladimir Putin, Dmitry Medvedev and other politicans of the Russian government died after an airplane crash in Slovakia. Since then, Russia followed a policy, resulting in a more "western-friendly" way (much more western-friendly than in OTL), but still being "its own thing". The relations between the US/NATO states and Russia are much more normal. Also there was never a Russo-Georgian war here. Also Russia never attacked Ukraine in this TL.
There was never an islamic revolution in Iran. The country is still a shahdom. There were some big reforms during the 80s and today is a wondeful example of a western-style state in the middle east. Also equal opportunities for women are a surprisingly big thing here.
Since the Arab Spring had no success in this TL (only Tunisia made some lukewarm smaller reforms) and especially there were never (or not that massive) civil wars in Syria and Lybia, the 2015-refugee desaster did not happen in these proportions like in OTL. If it will happen, it will have been much much milder.
Also - as in all my TLs - there was never a Covid 19 going to be happen.
This is also part of this TL.