Allied Warships

USS Pioneer (AM 105)

Minesweeper of the Auk class

USS Pioneer in 1943

NavyThe US Navy
PennantAM 105 
Built byPennsylvania Shipyards Inc. (Beaumont, Texas, U.S.A.) 
Ordered1 Apr 1941 
Laid down30 Oct 1941 
Launched26 Jul 1942 
Commissioned27 Feb 1943 
End service8 Jul 1946 

Decommissioned 8 July 1946 at San Diego, California
Struck from the Naval Register 1 July 1972
Sold to Mexico 19 September 1972 and renamed Leandro Valle (C 70)


Commands listed for USS Pioneer (AM 105)

Please note that we're still working on this section
and that we only list Commanding Officers for the duration of the Second World War.

1Howard Boyd Stevens, USNR27 Feb 1943Sep 1943
2Leroy Edward Rogers, Jr., USNRSep 194322 Sep 1945

You can help improve our commands section
Click here to Submit events/comments/updates for this vessel.
Please use this if you spot mistakes or want to improve this ships page.

Notable events involving Pioneer include:

15 Nov 1943

Convoy KMF 26.

This convoy departed the Clyde on 15 November 1943 and arrived at Alexandria / Port Said on 30 November 1943 / 1 December 1943.

This convoy was made up of the following transports; Arundel Castle (British, 19118 GRT, built 1921), Cameronia (British, 16297 GRT, built 1920), Chinese Prince (British, 9485 GRT, built 1943), City of Lincoln (British, 8039 GRT, built 1938), Clan Campbell (British, 9545 GRT, built 1943), Dempo (British, 17024 GRT, built 1931), Duchess of Bedford (British, 20123 GRT, built 1928), Dunnottar Castle (British, 15007 GRT, built 1936), Franconia (British, 20175 GRT, built 1923), Highland Princess (British, 14133 GRT, built 1930), Monarch of Bermuda (British, 22424 GRT, built 1931), Orion (British, 23371 GRT, built 1935), Ranchi (British, 16738 GRT, built 1925), Reina del Pacifico (British, 17702 GRT, built 1931), Samanco (British, 8336 GRT, built 1943), Samaria (British, 19597 GRT, built 1921), Sarmiento (British, 8335 GRT, built 1943) and Scythia (British, 19761 GRT, built 1920).

On departure the convoy was escorted by the light cruiser HMS Birmingham (Capt. H.W. Williams, RN) (actually joined on the 16th), sloops HMS Pelican (Cdr. J.S. Dalison, DSO, RN, S.O. of A/S escort), HMS Woodpecker (Lt.Cdr. H.L. Pryse, RNR) and the frigates HMS Evenlode (T/A/Lt.Cdr. A.L. Turner, RNR), HMS Jed (Lt.Cdr. R.C. Freaker, DSO and Bar, RD, RNR), HMS Rother (Lt.Cdr. W.R. Hickey, RNR) and HMS Spey (Lt.Cdr. B.A. Rogers, RD, RNR).

In the afternoon of 19 November, HMS Birmingham fuelled HMS Spey as the frigate had two out of four fuel tanks contaminated with seawater drastically effecting her range. With this underway refuelling she was able to continue on to Algiers.

During the morning of 20 November, the frigate HMS Rother also received some fuel from HMS Birmingham.

On passing the Straits of Gibraltar, HMS Birmingham parted company with the convoy and entered Gibraltar harbour. The AA cruiser HMS Colombo (Capt. D.H. Hall-Thompson, RN) and the destroyers HMS Anthony (Lt.Cdr. J.H. Wallace, DSC, RN) and HMS Brilliant (Lt.Cdr. J. Smallwood, RN) joined the convoy coming from Gibraltar. Also the submarine HMS Stonehenge (Lt. D.S.M. Verschoyle-Campbell, DSC and Bar, RN) joined the convoy for passage to Alexandria.

On the 25th, HMS Anthony and HMS Spey parted company with the convoy.

Off Oran / Mers-el-Kebir the transports Egra (British, 5108 GRT, built 1911), Karoa (British, 7009 GRT, built 1915) and Rohna (British, 8602 GRT, built 1926) joined the convoy. They were escorted by the destroyer escorts USS Frederick C. Davis (Lt.Cdr. O.W. Goepner, USNR), USS Herbert C. Jones (T/Lt.Cdr. A.W. Gardes, Jr., USN) and the minesweepers USS Pioneer (Lt. L.E. Rogers, Jr., USNR) and USS Portent (Lt. H.C. Plummer, USNR).

Off Algiers transport Monarch of Bermuda and the escorts HMS Brilliant, HMS Pelican, HMS Woodpecker, HMS Evenlode, HMS Jed, HMS Rother parted company with the convoy while the escort destroyers HMS Atherstone (Lt.Cdr. E.N. Wood, DSC, RNVR), HMS Catterick (Lt.Cdr. A. Tyson, RN), HMS Cleveland (Lt.Cdr. J.K. Hamilton, RN), RHS Miaoulis and ORP Slazak (Cdr. R. Nalecz-Tyminski, ORP) joined the convoy.

In the afternoon of 26 November the convoy was attacked by German aircraft and the transport Rohna was sunk by a glider bomb in position 36°56'N, 05°20'E. 1149 crew and passengers (mostly US troops) were killed in this attack.

Off Philipeville the transports Cameronia, Clan Campbell and Duchess of Bedford parted company with the convoy to proceed to that place while the transport Derbyshire joined the convoy coming from there.

On 27 November first HMS Colombo and later USS Frederick C. Davis and USS Herbert C. Jones parted company with the convoy to proceed to Bizerta.

The remainder of the convoy proceeded towards Alexandria / Port Said arriving there on 30 November / 1 December 1943.

26 Nov 1943
Rescued 606 survivors from the merchant ship Rohna, which was sunk in the Mediterranean on this date. The Rohna was sunk by a guided missile launched from a German aircraft, with over 1,000 men lost. (1)

3 Jun 1944

Convoy GUS 42.

This convoy departed Port Said on 3 June 1944.

On departure from Port Said the convoy was made up of the following transports / tankers; Bantria (British, 2407 GRT, built 1928), Dallington Court (British, 6889 GRT, built 1929), Empire Brook (British, 2852 GRT, built 1941), Esso Charleston (American (tanker), 7949 GRT, built 1938), Fort Rouille (British, 7131 GRT, built 1943), Fort St. Joseph (British, 7151 GRT, built 1943), Francis M. Smith (American, 7176 GRT, built 1943), Glacier Park (Canadian, 7137 GRT, built 1943), Jose Marti (American, 7176 GRT, built 1943), K.I. Luckenbach (American, 7822 GRT, built 1918), L.H. McNelly (American, 7244 GRT, built 1943), Louis A. Sengteller (American, 7176 GRT, built 1943), Nathan Clifford (American, 7200 GRT, built 1943), R.M. Williamson (American, 7244 GRT, built 1943), Susan V. Luckenbach (American, 7435 GRT, built 1918), Thorshavn (Norwegian (tanker), 6869 GRT, built 1930), Vasco (British, 2878 GRT, built 1939) and Waigstill Avery (American, 7176 GRT, built 1943).

On departure from Port Said the convoy was escorted by frigate HMS Barle (Lt.Cdr. A.H. Davies, RNVR) and the corvette HMS Myosotis (T/Lt. R. Lugg, RNR).

On 4 June 1944, the transports Empire Kinsman (British, 6744 GRT, built 1942), Pronto (Norwegian, 2201 GRT, built 1920), Samfairy (British, 7255 GRT, built 1944), Samsylvan (British, 7219 grt, built 1943) and William H. Moody (American, 7176 GRT, built 1943) joined the convoy coming from Alexandria. With these ships were also the corvettes HMS Bryony (T/Lt. T. Hand, RNR) and HMS Jonquil (T/A/Lt.Cdr. R.W. Tretheway, RNR).

On 8 June 1944, the following transports / tankers departed Augusta to join the convoy; Athelvictor (British (tanker), 8320 GRT, built 1941), Ben H. Miller (American, 7219 GRT, built 1943), Carelia (British (tanker), 8062 GRT, built 1938), Daniel H. Lownsdale (American, 7176 GRT, built 1942), Daniel Huger (American, 7176 GRT, built 1942), Elbridge Gerry (American, 7176 GRT, built 1942), Empire Usk (British, 3229 GRT, built 1918), F. Marion Crawford (American, 7181 GRT, built 1942), George W. Campbell (American, 7180 GRT, built 1943), Hannis Taylor (American, 7176 GRT, built 1943), Harlesden (British, 7273 GRT, built 1943), Hart Crane (American, 7207 GRT, built 1944), Henry George (American, 7176 GRT, built 1943), James McCosh (American, 7176 GRT, built 1943), James Turner (American, 7177 GRT, built 1942), John Lawson (American, 7176 GRT, built 1943), Johns Hopkins (American, 7200 GRT, built 1943), Joseph Hooker (American, 7200 GRT, built 1943), King James (British, 5122 GRT, built 1925), Levi Woodbury (American, 7191 GRT, built 1943), Mary Lyon (American, 7176 GRT, built 1943), Ocean Pride (Britsh, 7173 GRT, built 1942), Roger Sherman (American, 7181 GRT, built 1942), Samsteel (British, 7219 GRT, built 1943), Samuel Johnston (American, 7191 GRT, built 1943), Sun Yat-Sen (American, 7176 GRT, built 1943), Thomas Cresap (American, 7200 GRT, built 1943), Thomas Nelson Page (American, 7176 GRT, built 1943) and Wellington Court (British, 4979 GRT, built 1930).

On 9 June 1944, the following transports / tankers arrived at Augusta after having parted company with the convoy; Bantria, Dallington Court, Empire Brook, Esso Charleston, Pronto, Samsylvan and Vasco.

On 9 June 1944, the transports Andrew Pickens (American, 7176 GRT, built 1943) and Hermes (Dutch, 2739 GRT, built 1920) joined the convoy coming from Malta. Also joining for passage to Gibraltar was the submarine HMS Taurus (Lt.Cdr. M.R.G. Wingfield, DSO, DSC and Bar, RN).

On 10 June 1944, the transports / tankers joined the convoy coming from Bizerta; Alexander J. Dallas (American, 7180 GRT, built 1943), British Respect (British (tanker), 8479 GRT, built 1943), Empire Damsel (British (tanker), 784 GRT, built 1942), G.C. Brovig (Norwegian (tanker), 9718 GRT, built 1930), J.C. Osgood (American, 7176 GRT, built 1943), James W. Johnson (American, 7207 GRT, built 1943), Motia (Italian, 2336 GRT, built 1918), Nueva Granada (Norwegian (tanker), 9968 GRT, built 1937), Pierre Gibault (American, 7176 GRT, built 1943), Robert H. Harrison (American, 7181 GRT, built 1942). Also the current escort, which arrived at Bizerta on 10 June 1944, was relieved by a new escort which was made up of the AA cruiser HMS Caledon (Capt. R.F. Nichols, RN), destroyer USS MacLeish (Lt.Cdr. R.P. Winkel, USNR, with COMTASKFOR 63, T/Capt. H.T. Read, USN on board), destroyer escorts USS Eisner (Lt.Cdr. D. McVickar, USNR, with COMCORTDIV 52, T/Cdr. R.P. Walker, USN on board), USS Wingfield (Lt.Cdr. H.E. Purdy, USNR), USS Thornhill (Lt. J.B. Shumway, USNR), USS Rinehart Lt. P.W. Crouch, Jr., USN), USS Roche (Lt.Cdr. R.E. Parker, USNR), USS Jordan (Lt.Cdr. D. Bontecou, USNR, with COMCORTDIV 55, T/Cdr. C.R. Simmers, USN on board), USS Liddle (T/Cdr. R.M. Hinckley, Jr., USN), USS Cofer (Lt.Cdr. A.P. Chester, USNR), USS Kephart (Cdr. I.H. Cammarn, USNR), USS Newman (Lt.Cdr. W.C. Meyer, USNR), USS Lloyd (Lt.Cdr. P.N. Gammelgard, USNR) and the minesweeper USS Pioneer (Lt.Cdr. L.E. Rogers, Jr., USNR).

On 11 June 1944, the Empire Usk and Hermes arrived at Bizerta after having been detached from the convoy.

On 11 June 1944, the Harlesden, Motia, Samsteel and Wellington Court arrived at Bone after having parted company with the convoy.

On 11 June 1944, the transports Bialystok (Polish, 7173 GRT, built 1942), Empire Harbour (British (tanker), 797 GRT, built 1943) and Sinnington Court (British, 6910 GRT, built 1928) joined the convoy coming from Bone.

On 12 June 1944, the Empire Harbour, Ocean Pride, Thorshaven and HMS Caledon arrived at Algiers after having parted company with the convoy.

On 12 June 1944, the following transports / tankers joined the convoy coming from Algiers; Cornelius Harnett (American, 7177 GRT, built 1942), David Bushnell (American, 7181 GRT, built 1942), Edward H. Crockett (American, 7176 GRT, built 1944), Elijah White (American, 7176 GRT, built 1942), Empire Emerald (British (tanker), 8032 GRT, built 1941), Empire Foam (British, 7047 GRT, built 1941), Empire Nerissa (British, 7096 GRT, built 1942), Howell E. Jackson (American, 7176 GRT, built 1943), Joseph N. Teal (American, 7176 GRT, built 1942), Loch Dee (British, 5252 GRT, built 1937) Malplaquet (British, 499 GRT, built 1940), Noah Webster (American, 7176 GRT, built 1943), Prometheus (British, 6095 GRT, built 1925), Samuel Adams (American, 7176 GRT, built 1942), Vacport (British (tanker), 6774 GRT, built 1930), Walter Reed (American, 7176 GRT, built 1943) and William Blount (American, 7176 GRT, built 1942).

On 13 June 1944, the following transports parted company with the convoy and proceeded to Oran Bay; Alexander J. Dallas, Empire Damsel, Hart Crane, Howell E. Jackson, John Lawson, Malplaquet, Sinnington Court and William Blount. USS Pioneer proceed to Mers-el-Kebir.

On 13 June 1944, the following transports / tankers joined the convoy coming from Oran / Mers-el-Kebir; David Lubin (American, 7176 GRT, built 1943), Empire Stalwart (British, 7045 GRT, built 1943), G.S. Walden (British (tanker), 10627 GRT, built 1937), John Fairfield (American, 7176 GRT, built 1943), John P. Holland (American, 7176 GRT, built 1942), Lambert Cadwalader (American, 7196 GRT, built 1942), Samfield (British, 7219 GRT, built 1943), Samgallion (British, 7210 GRT, built 1944), Samkansa (British, 7219 GRT, built 1943), Walt Whitman (American, 7176 GRT, built 1942) and Walter Forward (American, 7180 GRT, built 1943).

The naval tanker (escort oiler), USS Cowanesque (Cdr. L.S. McKenzie, USNR) also joined the convoy coming from Oran / Mers-el-Kebir.

On 14 June 1944, the following transports / tankers arrived at Gibraltar; Bialystok Empire Foam, Fort Rouille, Fort St. Joseph and King James. HMS Taurus also parted company with the convoy and entered Gibraltar.

On 14 June 1944, the tankers British Commodore (British (tanker), 6865 GRT, built 1923) and British Energy (British (tanker), 7209 GRT, built 1931) joined the convoy coming from Gibraltar. The following day the British Commodore developed engine trouble and was ordered to proceed to Casablanca but she returned to Gibraltar instead where she arrived on 16 June 1944.

On 15 June the transports; Cape Hawke (British, 5081 GRT, built 1941), Charles Carroll (American, 7191 GRT, built 1942), Empire Alliance (British (tanker), 9909 GRT, built 1943), Fort Souris (British, 7134 GRT, built 1942), Hopepeak (British, 5179 GRT, built 1938), John Barton Payne (American, 7176 GRT, built 1943) and Samderry (British, 7219 GRT, built 1944) joined the convoy coming from Casablanca which they had departed on the 14th. They were escorted to the rendezvous by the minesweeping sloops La Gracieuse, Commandant Delage and the patrol vessel L'Indiscret.

On the above ships joining the convoy the transport Loch Dee parted company to proceed to Casablanca with the French escort vessels. They arrived at Casablanca later on the 15th.

Around 1730Z/16, the Pierre Gibault developed engine trouble and parted company with the convoy. USS Eisner was detached to escort her. They rejoined the convoy around 1200Z/17.

On 18 June 1944, USS Macleish, USS Liddle, USS Jordan, USS Kephart, USS Newman, USS Lloyd and USS Cofer fuelled from USS Cowanesque.

On 19 June 1944, the transport Joseph Hewes (American, 7177 GRT, built 1942) joined coming from Horta, Azores. She was escorted to the rendezvous by the A/S trawler HMS Cape Comorin (/Lt. F.K. Turner, RNVR) which did not join the convoy.

On 23 June, USS Cowanesque refuelled USS Macleish, USS Jordan, USS Kephart, USS Lloyd, USS Cofer and USS Newman.

Around 0630Q/26, USS Cowanesque was detached to Bermuda. To escort her to Bermuda the escort destroyers USS Hodges (Lt.Cdr. V.B. Staadecker, USNR, with COMCORTDIV 74, T/Cdr. C.F. Hooper, USN on board) and USS William Seiverling (Cdr. C.F. Adams, Jr., USNR) had just made rendezvous with the convoy. They arrived at Bermuda the following morning.

Around 1710Q/27, the Glacier Park was straggling and unable to regain her station was ordered to proceed to St. John, New Brunswick.

Around 1940Q/27, the ' New York ' section of the convoy of 41 ships was detached, they were escorted by USS Macleish, USS Eisner, USS Wingfield, USS Thornhill, USS Rinehart and USS Roche.

The ' Chesapeake Bay ' section of the convoy was made up of the following ships; Ben H. Miller, Cornelius Harnett, Daniel H. Lownsdale, Daniel Huger, David Bushnell, David Lubin, Elbridge Gerry, Empire Alliance, Empire Nerissa, Empire Stalwart, Fort Souris, Francis M. Smith, G.S. Walden, Hannis Taylor, Henry George, James McCosh, James Turner, James W. Johnson, John P. Holland, Joseph Hewes, Joseph Hooker, Joseph N. Teal, Levi Woodbury, Robert H. Harrison, Samuel Adams, Samuel Johnston, Thomas Cresap, Thomas Nelson Page, Walt Whitman, Walter Reed and William H. Moody. They were escorted by USS Jordan, USS Newman, USS Liddle, USS Kephart, USS Cofer and USS Lloyd.

The ' Chesapeake Bay ' section arrived at its destination on 28 June 1944. The ' New York ' section arrived at its destination on 29 June 1944.

Media links

Allied Secret: The Sinking of Hmt Rohna

Jackson, Carlton

The Rohna Disaster

Bennett, James Gordon
(£ 23.00)

Forgotten Tragedy

Jackson, Carlton


  1. Personal communication

Return to the Allied Warships section

As an Amazon Associate earns a commission from qualifying purchases.