OK, mine first here after few years hanging around.
On August 29 1944 Slovak Army and resistance uprising against pro German regime started. Original plan was to open Carpathian passes for Soviets and move the front line without much fighting in Slovakia towards borders with Protectorate Bohmen unf Mahren.
http://en.wikipedia.org/wiki/Slovak_National_Uprising
Unfortunately uprising started prematurely after some partisans units actions against German military and civilian personal transferring through Slovakia. Germans started with occupation of the country and disarming Slovak Eastern army which was suppose to open east Carpathian passes after chaos in command of this Army - general Augustin Malar, famous from commanding Slovak fast division on Eastern front flew to Bratislava and tried to calm down situation as he felt Uprising was premature. His speech on Slovak radio didn't help, as Germans were already acting and his popularity with Slovak troops only slow down reactions to Germans. His deputy deserted to Soviet side on board of planes which took of from Eastern Slovakia towards Soviets lines. Without proper command Germans managed to disarm Slovak Eastern Army, which was best equipped part of Slovak military. General Malar was arrested on his return to Eastern Slovakia after his plane landed at airport near Presov and later probably executed in German camp in Flossenburg concentration camp - his fate is not now till this date. However some units, mostly under command of Colonel Mikulas Markus managed to fight German units in Eastern Slovakia and eventually made their way to central Slovakia where they joined 1st Czechoslovak Army of 18 000 at start and 60 000 at the highest level which fought Germans forces from late August till end of the October.
Leftover of Slovak Air force at airport Tri Duby and 1st Czechoslovak fighter regiment with La-5FN managed to contest German air superiority over central Slovakia for 2 moths. Bi-planes of Slovak insurgent Airforce even managed two last victories of bi-planes in history. Fighter pilot of Avia B-534 shot down Hungarian Ju-52 and gunner of bomber Letov S-328 shot down German Fw-189 which attacked his plane.
Now to POD, what if after premature start of Uprising General Augustin Malar doesn't leave for Bratislava but starts actions against Germans right away. Slovak managed to hold central Slovakia OTL. There is high probability that with Germans not able to move troops through Central Slovakia 9main Railway from Protektorate to Kosice (Kassa in Hungarian hands at the time).
With Eastern Slovakia in hands of Slovak army, Soviet troops and Czechoslovak armed corps could move through Slovakia and will avoid fights in mountains on the border - from late August to October 1944 and then in Slovak mountains from October 1944 till April 1945.
How would it change Soviets Strategy? German South flank will be open to attacks from Slovakia towards Budapest and Vienna in early September/ October. German Northern flank probably wouldn't be so exposed as Carpathians are covering it but still Soviets could be able to push towards Ostrava - mines and steel works in area and towards industrial bases in Moravia.
On August 29 1944 Slovak Army and resistance uprising against pro German regime started. Original plan was to open Carpathian passes for Soviets and move the front line without much fighting in Slovakia towards borders with Protectorate Bohmen unf Mahren.
http://en.wikipedia.org/wiki/Slovak_National_Uprising
Unfortunately uprising started prematurely after some partisans units actions against German military and civilian personal transferring through Slovakia. Germans started with occupation of the country and disarming Slovak Eastern army which was suppose to open east Carpathian passes after chaos in command of this Army - general Augustin Malar, famous from commanding Slovak fast division on Eastern front flew to Bratislava and tried to calm down situation as he felt Uprising was premature. His speech on Slovak radio didn't help, as Germans were already acting and his popularity with Slovak troops only slow down reactions to Germans. His deputy deserted to Soviet side on board of planes which took of from Eastern Slovakia towards Soviets lines. Without proper command Germans managed to disarm Slovak Eastern Army, which was best equipped part of Slovak military. General Malar was arrested on his return to Eastern Slovakia after his plane landed at airport near Presov and later probably executed in German camp in Flossenburg concentration camp - his fate is not now till this date. However some units, mostly under command of Colonel Mikulas Markus managed to fight German units in Eastern Slovakia and eventually made their way to central Slovakia where they joined 1st Czechoslovak Army of 18 000 at start and 60 000 at the highest level which fought Germans forces from late August till end of the October.
Leftover of Slovak Air force at airport Tri Duby and 1st Czechoslovak fighter regiment with La-5FN managed to contest German air superiority over central Slovakia for 2 moths. Bi-planes of Slovak insurgent Airforce even managed two last victories of bi-planes in history. Fighter pilot of Avia B-534 shot down Hungarian Ju-52 and gunner of bomber Letov S-328 shot down German Fw-189 which attacked his plane.
Now to POD, what if after premature start of Uprising General Augustin Malar doesn't leave for Bratislava but starts actions against Germans right away. Slovak managed to hold central Slovakia OTL. There is high probability that with Germans not able to move troops through Central Slovakia 9main Railway from Protektorate to Kosice (Kassa in Hungarian hands at the time).
With Eastern Slovakia in hands of Slovak army, Soviet troops and Czechoslovak armed corps could move through Slovakia and will avoid fights in mountains on the border - from late August to October 1944 and then in Slovak mountains from October 1944 till April 1945.
How would it change Soviets Strategy? German South flank will be open to attacks from Slovakia towards Budapest and Vienna in early September/ October. German Northern flank probably wouldn't be so exposed as Carpathians are covering it but still Soviets could be able to push towards Ostrava - mines and steel works in area and towards industrial bases in Moravia.