On 13 August 1861, Nathan W. Wilcox joined the Engineering Regiment of the West, out of Missouri. He lived in New London, Iowa. He recruited over 20 of his fellow Iowans before reporting for duty. He spent the next two-plus years building roads, bridges, canals, and railroads. He was discharged in Nashville where he continued to work under contract to the government doing surveying and architectural work.
When the war was over, he sent for his family and settled in Tennessee, living and working in Knox, Davidson, Montgomery and Franklin counties, over the next 25 years. When his body finally gave out 9 Sept 1891, he was interred in Mt. Olivet Cemetery in Nashville. If he had a tombstone originally, it has long-since disappeared. Descendants of Captain Wilcox recently replaced his tombstone with a new marker.