Can Obsequium mean "act of subservience" ?

[awlright]

also presumably is duasque filias translated as two daughters (obviously!) rather than 2 sons...

Cheers!

[awlright]

is this translation correct:
"quod contra vertit, adeo ut regnum a centurionibus, domus a servis velut capta vastarentur"
What in fact turned out was the opposite, to such an extent that his kingdom was ravaged by centurions and his home as though captured, was plundered by his slaves."

[thesaurus]

Yes, "obsequium" can mean an act of subservience, and in fact that's its main meaning.

"Duas filias" can only mean "two daughters," and not "two sons," because it's in the feminine gender.

And your translation of "quod contra vertit..." looks good to me.