What are signal phrases and why are they important in your body paragraphs?

hooch has about 3% alcohol content so the 5 gallon 90% platinum vodka would be stronger because it has a higher alcohol content then hooch.  

1.the hosts on two opposing mountains stood,  

2.thick as the foliage of the waving wood;  

3.between them an extensive valley lay,  

4.o'er which the gleaming armour pour'd the day,  

5.when from the camp of the philistine foes,

6. dreadful to view, a mighty warrior rose; in the dire deeds of bleeding battle skill'd,