Arrange the given sentences (1-6) in the correct order to form a coherent paragraph. 1. Porsena, the King of the Etruscans, had raised a great army and was marching toward Rome. 2. Then, one morning the army of Porsena was seen coming over the hills from the north. 3. The Romans did not have very many soldiers at that time, and they knew that they were not strong enough to meet the Etruscans in open battle. 4. There was once, a war between the Roman people and the Etruscans who lived in the towns on the other side of the Tiber River. 5. So they kept themselves inside their walls and set guards to watch the roads. 6. The city of Rome had never been in such great danger before.