Olympian Jove, thunderous Lord on high,
Flashes the lightning, bringing in its train
Tempestuous storm of mingled rain and hail
Or snow, by winter sprinked o’er the fields;
Thus op’ning wide the vasty jaws of war.

Thundering Jove hurls a lightning bolt down onto the raging battlefield beneath him. Those unlucky to be in its path will feel his rage. The omen is not to be ignored and the survivors perceive the hand of Heaven. One side will have its hopes thwarted; one will succeed.