In the third year of Cyrus king of Persia, a revelation was given to Daniel (who was called Belteshazzar). Its message was true and it concerned a great war. The understanding of the message came to him in a vision.
NIV
IN THE third year of Cyrus king of Persia a word was revealed to Daniel, who was called Belteshazzar. And the word was true and it referred to great tribulation (conflict and wretchedness). And he understood the word and had understanding of the vision. [Dan. 8:26; Rev. 19:9.]AMP
In the third year of Cyrus king of Persia a thing was revealed unto Daniel, whose name was called Belteshazzar; and the thing was true, but the time appointed was long: and he understood the thing, and had understanding of the vision.
KJV