1860 The census taker for this year has rendered the family name as "Legua", and James is called "Jackey" (< Jacques). He is living next door to Charles Manaige, whose wife Mary Ann is almost certainly James's sister. Nearby is his sister Sophia (called "Sophelia"), and also close by is his father James, who is living with his brother Simeon and his wife Margaret (Grignon). James's wife Margaret Brunette appears to have died by that date. 
James enlisted in Co. H, Second Volunteer Minnesota Infantry on 15 July 1861 for a term of service ending 16 December 1863. At some point in this tour of duty he had been held as a prisoner of war. Nevertheless, he was able to reenlist on 16 December 1863.
During his second tour of duty, he fell ill and died 15 March 1864 in Mankato, Blue Earth County, Minnesota, and was buried in McPherson Union Cemetery, Saint Clair, Blue Earth County, Minnesota. On 21 August 1888, a private contractor was hired at government expense to supply the stone that now stands at his grave site. As in life, he resides next to the Manaige family (the children of Frank and Nellie) whose stone can be seen in the primary image.