I repeat, what other government? If it was legally doubtful, and made no attempt to establish its legitimacy, we can not recognize it as a government.
As to your concern about "your government" allow me to turn it around on you. Would they not have been derelict in their legal, moral and sworn constitutional duty to allow a legally doubtful regiem to assume control over 40% of the nation's territory without offering resistance?
I know damn well I'd be calling for impeachment if that were to happen today.
What would you do?