cultswatter!
For realistic answer see: Carl Olif Jonnson's book. The Gentile Times Reconcidered.
http://www.amazon.ca/s?ie=UTF8&rh=n%3A954808%2Cp_3%3A%2410%20-%20%2415&page=2
Jehoiakim of Judea broke his covenant of retribution with Nebuchadnezzar. For that failure to pay and turning to Egypt for help in that resistance, the nation was disposed and transported to Babylon till 537 BCE. So The Jew's were in servitude to Babylon for a total of 70 years. From 607 to 537 BCE, released to go back to their homeland and rebuild their temple by Cyrus The Persian. However the distruction of Jerusalem and the temple took place in 587 BCE.
The Sage!