"Nobody knows but God, Whether i am destined to lie Under a foreign clod" - Faith in religion to determine his fate. Straight-forward expression to death - acceptance that the nation is swept away by authority and that his singular one deviant opinion is one personal and in-important to society
In-important to a brainwashed society so he recites his opinion to "The bugle call in the morning" - Over the sound of jubilation and excitement, the speaker overlaps his view. Serving to express the futility of a deviant opinion to war and the entrapment in a overzealous society.
"But laughing, storming, scorning, Only the bugles know" - Ridiculed for his belief - Makes ironic remark that only the bugles can understand him
Bugles - inaminate yet hold so much power. "And they do not care" - A repeated call to war. Remorseless, unforgiving sound no matter a certain individuals disarray everyone must continue