Question from Orberg LLPSI Cap XLIII

Latin Learning Latin
1

..Tullus “Nuntiate” inquit “regi vestro regem Romanum deos facere testes uter prius populus legatos res repetentes superbe dimiserit, ut in eum omnes huius belli clades vertant!”

Tullus said: 'Tell your king that the Roman king, the gods having been madde his witnesses, (uter: whether?) the people should first dismiss the legates proudly seeking redress, even if (ut) in him [the king] all of their wars turn to defeats.

I can’t really figure out the role of ‘uter’ and ‘ut’ in this sentence…

2

I suspect uter is chiefly what threw you off.
regem Romanum deos facere testes means …“that the Roman king makes the gods witnesses…”
uter means “which (of two)”; uter prius populus means “which nation first”.
ut begins a purpose clause.

3

Thanks for this.