What was Daniel being trained for in Babylon?
Daniel, as a young Jewish captive in Babylon, was being trained by the Babylonians for service in the king's kingdom. This training prepared him for service under King Nebuchadnezzar, and he was later brought to a place of preeminence by interpreting the king's dream.
Les explains that Daniel was a young Jewish captive taken to Babylon after Nebuchadnezzar besieged and took the Jews captive out of Jerusalem and Judea. The Babylonians trained him for service in the king's kingdom. Daniel later rose to preeminence by interpreting Nebuchadnezzar's dream, which the king's magicians could not bring back or interpret. This training and promotion positioned him for service within the Babylonian government.