Operation Mosby I — Reconnaissance in Force, Pleiku–Kontum (April 1966)

Operation Mosby I — closing the highlands fight

Context page — operation level. Built from the 1st Cavalry Division's Combat After Action Report for Operations Lincoln and Mosby I (filed with the Lincoln event). It frames 2/8 Cavalry's arc in mid-to-late April 1966 — the reconnaissance-in-force that closed the Lincoln operation, and the return to An Khe during which D Company lost SP4 Terry Rippy. The operation's shape is documented; the company's day-by-day movements await the battalion journal.

What it was

Operation Mosby I (11–17 April 1966) was the reconnaissance-in-force that closed out the 1st Cavalry Division's spring campaign in the western highlands. As Operation Lincoln (the search-and-destroy in Pleiku Province, 25 March – 8 April) wound down, the division mounted Mosby I under OPLAN 16-66 as a two-brigade operation in Pleiku and Kontum Provinces, working along the Cambodian border from the forward base at the Oasis (grid ZA 115275). The reconnaissance phase ran 16–17 April; on completion the division made its return movement to An Khe — Camp Radcliff, in Binh Dinh — to refit before the May operations (Crazy Horse). The division was commanded by MG Harry W. O. Kinnard.

Where 2/8 Cavalry — and D Company — fit

2/8 Cavalry was a 1st Brigade battalion (brigade commander Col. John J. Hennessey), and the 1st Brigade was one of the two brigades committed to Mosby I. On April 11 — the operation's first day — 2/8 Cav air-assaulted into LZ Amy (YA693474) and LZ Kim (YA663478) in western Pleiku Province along the Cambodian border. A CIDG platoon working with the battalion spotted ten VC bathing in the Dak Hodrai river near LZ Amy on April 12, but the group escaped when the point man fired prematurely; no other contact was reported for 2/8 Cav during the operation.

As the operation closed, the after-action report records the 1st Brigade being airlifted back to An Khe on 16–17 April — thirty-seven C-130 sorties moving the brigade, Division Headquarters, and engineer elements out of the highlands. The 3rd Brigade, meanwhile, held the Highway 19 security mission — the Pleiku–An Khe convoy road the AAR repeatedly flags as mine-threatened.

The loss of SP4 Terry Rippy

It is in this window — the days just after the Mosby I recon phase and the return to An Khe — that D Company lost SP4 Terry Allen Rippy, killed by an explosive device on 22 April 1966. He had been with the company since the division's first months in country, and the casualty record classifies the death "hostile, died outright."

The location data helps place it. During Lincoln, 2/8 Cavalry's forward operating area was the southern Chu Pong / Cambodian-border zone: D Company is pinned at LZ Cotton (grid YV843956) on 4 April, with the battalion's lone Lincoln contact a few days later nearby (4 VC engaged at YV847938 on 7 April). LZ Cotton sits about 40 km southwest of the Oasis forward base — handy enough to operate from in the highlands — but roughly 120 km straight-line from An Khe (and half again that by road, north to Pleiku and then east on Highway 19). That distance is the point: a unit at Cotton did not simply convoy home. The after-action report shows the 1st Brigade airlifted back to An Khe by C-130 on 16–17 April, staged through the Oasis airfield. So by the 22nd, D Company had been back at An Khe (Camp Radcliff) for several days.

The likeliest reading, then, is that Rippy was killed by an explosive device at or near An Khe in the post-return refit window — the An Khe / Camp Radcliff TAOR was itself heavily mined and booby-trapped — rather than on the long road move (the brigade flew, it did not convoy from the forward LZs). A Highway 19 incident during any residual ground movement is a secondary possibility. The exact place and circumstances are not yet confirmed, and the casualty province of record, "Quang Nam," is a DCAS error (the division was in the II Corps highlands, not the I Corps coast). His profile and this frame both flag the 2/8 Cav daily staff journal (NARA RG 472) as the record that would pin the action.