J H. Henry
Enlisted as a Private
"F" Co. AR 1st Infantry

Sources used by Historical Data Systems, Inc.:
- Index to Compiled Confederate Military Service Record

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Shiloh Confederate order of battle

Second Army Corps
MG Braxton Bragg

1st Brigade
Col Randall L. Gibson

1st Arkansas: Col James F. Fagan

https://en.wikipedia.org/wiki/Shiloh_Confederate_order_of_battle

Note, this is the only 1st Arkansas listed
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The 1st Arkansas Infantry (1861–1865) was a Confederate Army infantry regiment during the American Civil War. The regiment was raised in April 1861 by Colonel Thompson B. Flournoy. It moved first to Virginia, but transferred back to Tennessee and served the rest of the war in the western theater, seeing action in the Kentucky, Tennessee and Georgia campaigns. Following its depletion in numbers, the regiment was consolidated several times with other Arkansas regiments, finally merging in 1865 into the 1st Arkansas Consolidated Infantry Regiment. There were three regiments known as "1st Arkansas" during the war. The second unit with the designation of "1st Arkansas" was the 1st Infantry, Arkansas State Troops, which was mustered into Confederate service at Pitman's Ferry, Arkansas, on 23 July 1861, under the command of Colonel Patrick Cleburne; this unit was eventually redesignated as the 15th Arkansas Volunteer Infantry. The third unit bearing the title "1st Arkansas" was the 1st Arkansas Volunteer Infantry, which served with the Union Army.

https://en.wikipedia.org/wiki/1st_Arkansas_Infantry_Regiment

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First Arkansas Confederate

The First Arkansas Confederate was organized in May,
1861, at Little Rock, immediately after the taking of the
arsenal. Before the creation of the military board,
Thompson B. Flournoy had been authorized by President
Jefferson Davis to organize a regiment for the Confeder-
ate service. The first companies which arrived in Little
Rock sought admission into this regiment, and were
recognized by Colonel Flournoy, a patriotic planter of La-
conia, on the Mississippi river, and supporter of the presi-
dential ticket of Douglas and Johnson. He had certain
other gentlemen associated with him in .the commission,
which gave dissatisfaction, and upon the actual organiza-
tion of the regiment Colonel Flournoy was defeated for
the colonelcy, and Capt. James F. Fagan, of Saline county,
was elected

Source: Confederate Military History, vol. XIV, p. 291

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Shiloh after battle report:

Report of Col. James F. Fagan, First Arkansas Infantry.

HDQRS. FIRST ARKANSAS REGT.,
Near Corinth, Miss., April 9, 1862.
COL.: I beg leave to submit the following report of the part taken and the loss sustained by my regiment in the battles of the 6th and 7th instant:

Source: Official Records: Series I. Vol. 10. Part I, Reports. Serial No. 10