23 “Thus he said, ‘The fourth animal will be a fourth kingdom on earth, which will be different from all the kingdoms, and will devour the whole earth, and will tread it down, and break it in pieces.
Daniel 7:23 Cross References - WEB
Daniel 2:40
40 The fourth kingdom will be strong as iron, because iron breaks in pieces and subdues all things; and as iron that crushes all these, it will break in pieces and crush.
Daniel 7:7
7 “After this I saw in the night visions, and, behold, there was a fourth animal, awesome and powerful, and exceedingly strong. It had great iron teeth. It devoured and broke in pieces, and stamped the residue with its feet. It was different from all the animals that were before it. It had ten horns.
Luke 2:1
1 Now in those days, a decree went out from Caesar Augustus that all the world should be enrolled.