According to Booth's Records, here is the info on Amos Porter:
Porter, Amos, Pvt. Sergt. Co. F, 9th La. Inf. En. July 7, 1861, Camp Moore, La. Present on all Rolls to Dec., 1861. Re-enlisted Feb. 6, 1862, Camp Carondelet, Va. Roll to July 1, 1862, Present or absent not stated. Appointed 5th Sergt., April 16, 1862. Rolls July 30, 1862, to Dec., 1862, Absent, wounded. Rolls Jan., 1863, to June, 1863, Present. Roll July and Aug., 1863, Present. Promoted from 5th Sergt, to 1st Sergt., July 1, 1863. Roll Sept. and Oct., 1863, Present. Roll Nov. and Dec., 1863, Absent, sick, at Hospl. since Dec. 21, 1863; place not known.
Roll Jan. and Feb., 1864, Absent on sick furlough. Record copied from Memorial Hall, New Orleans, La., by the War Dept., Washington, D. C., June, 1903, born Louisiana, occupation farmer, Res. Mansfield, La., age when enlisted 22, single. Received a 30 days' furlough Dec. 15, 1863; never returned.
Please note that Booth's is not 100 percent correct, and some information may be missing. You can order his service records, there is a link at top of page.