MrMeanMustard
In connection with the translation of Jer.25:11 you should consult the major technical commentaries on Jeremiah and read what Rolf Furuli has written on the grammar of this text.
Yes one must read the context of this chapter and you will notice that in vs.1 and vs.9 which shows that the target is Judah and not Babylon.
The historical accounts in the Bible concerning Judah provide data that allows one to construct a clear chronology for Judah but such is not the case for the other nations.
Jer. 25:11 simply states that Judah along with the other nations would serve Babylon for a period of 70 years and scholar has always said that the 70 years was a period of desolation of Judah, an Exile of the Jews to Babylon and a period of servitude to Babylon beginning with the Fall in 607 BCE until the Return in 537 BCE.
But that is what Jeremiah explicitly states that it was only after the 70 years had been fulfilled or ended that a Judgement against Babylon would come into effect.
I have it exactly what Jeremiah states in vs.12/
scholar