John Lankford of Martz, Ind. July 24, 1861 pvt., Co. I, 21st Ind. Infantry Rgt. Oct. 15, 1862 discharged for disability (Regiment designated 1st Ind. Heavy Artillery Rgt. in February 1863)
John Lankford, Oct. 8, 1861 pvt., Co. E, 33rd Ind. Infantry Rgt. no further information
William Lankford of Nashville, Ind., Dec. 14, 1861 pvt., Co. E, 51st Ind. Infantry Rgt. Dec. 14, 1864 mustered out
William Lankford of Eagletown, Ind., Dec. 19, 1861 pvt., Co. H, 57th Ind. Infantry Rgt. April 7, 1862 deserted
William Lankford, Aug. 15, 1862 cpl., Co. H, 79th Ind. Infantry Rgt. Aug. 5, 1863 discharged
William Lankford of Edwardsport, Ind., Sept. 3, 1862 pvt., Co. C, 80th Ind. Infantry Rgt. unknown date promoted sgt. June 23, 1865 mustered out at Salisbury, N.C.
Larkin Lankford of Mount Prospect, Ark., Dec. 19, 1863 pvt., Co. H, 93rd Ind. Infantry Rgt. Nov. 10, 1865 mustered out
I would guess that Henry of 93rd Ind. is right man as Larkin also served in 93rd Ind.
Source: Report of the Adjutant General of the State of Indiana