What does Daniel 10:1 mean?

In the third year of Cyrus, king of Persia, a message was revealed to Daniel (who was also called Belteshazzar). The message was true and spoke of a great conflict. He understood the message and grasped the vision. Daniel 10:1 - Modern Text Bible

(Daniel receives a new revelation during the reign of Cyrus, and this time he fully understands its meaning.)