Longer and longer shadows will obscure them

From Neptune's Inferno by James D. Hornfischer. A history of the battle of Guadalcanal beginning August 7, 1942, our first sustained offensive campaign in the Pacific.

The novelist James Michener wrote long ago, “They will live a long time, these men of the South Pacific. They had an American quality. They, like their victories, will be remembered as long as our generation lives. After that, like the men of the Confederacy, they will become strangers. Longer and longer shadows will obscure them, until their Guadalcanal sounds distant on the ear like Shiloh and Valley Forge.” The founders of the U.S. Navy, having faced their own moments of decision, from John Paul Jones off Flamborough Head to Stephen Decatur against the Barbary Pirates, would have felt kinship with the men of the South Pacific Forces. There as everywhere, men in uniform fought like impulsive humans almost always have: stubbornly, viciously, brilliantly, wastefully, earnestly, stupidly, gallantly. At Guadalcanal, so distant on the ear, a naval legacy continued, and by their example in that bitter campaign the long shadows of their American quality reach right on up to the present.