Whitman’s speaker bids an emotional farewell to a fellow soldier, recalling the rough, shared life of marching, camp, and the bloody thrill of battle that filled them with the grand, terrible energy of war. Those days were a deep expression of courage and time itself.
But now the soldier’s mission is complete. The speaker, though, feels no such closure. His “contentious soul” is still on campaign, forging through untested roads thick with ambushes and setbacks. The fighting doesn’t stop — it just turns inward, becoming a series of fiercer, weightier personal battles. The mood shifts from warm, nostalgic parting to a gritty, forward-leaning resolve. War may end for one, but for another, the real struggle never leaves the field; it only changes shape.