Johnamos
if you are looking at the perspective of the 70 years then that could only have applied in Zedekiah's time ending his reign in 607 BCE.
If you discount the 70 years then Babylonish domination would have begun according to Dan 1:1 in the third year of his kingship during the reign of Jehoiakim when his vassalage to Neb would have commenced in 617 BCE.
Nice and easy
scholar JW