No, I mean that Poland and the Nazis both invaded parts of Czechoslovakia;
If you are implying some kind of agreement between those two you are wrong.
Trying to deflect the issue
trying to imply things and making big issue out of small border dispute is a clear sign that some trolls here are bored.
Fall of Czechoslovakia came in two stages, in the first stage Germans took The Sudetenland and Poland their Cieszyn.The Second stage
seen de-integration of Czechoslovakia as a state and then when so called invasion
had happened and Poland had no part in the stage two.
There is the thing, Poland paid Czechoslovakia tit for tat.
The Czechoslovakian government in pre-war times snubbed Poland many times believing themselves safe. They calculated that Poland is in danger from both Germany and Soviets, whereas Czechoslovakia seen only Germany as a potential danger and lulled themselves into false sense of security believing that have pretty sound and cordial relation with Soviets.
Also Czechoslovakian government for most part of the early XX century was a darling of western powers mainly France.They considered themselves being in a close and cordial alliance with France.
When out of the blue they have been sold down the river and they long standing ally though nothing of betraying them.
Here came part I don't understand. Seeing how so called western powers are treating their long standing and praised ally, how they disregard their oblivions how they easily exchanged honour for convenience without even as much as a bating an eyelid. How they could have take their empty promised as a face value and how they could have refuse Hitler's offers and overtures.
It is clear that it was the only rational course of action at the time.
what were they thinking?
That is the qestion.