What is the meaning of davids portrait of napoleon with broader sky and mountains compared to delaroches portrait

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,

often a noun phrase is just a noun or a pronoun:

people like to have money.

i am tired.

it is getting late.