Today in WW II: 23 Feb 1942 Japanese submarine I-17 attacks a coastal oil refinery at Santa Barbara, CA. 17 high-explosive shells cause insignificant damage.  More 
23 Feb 1944 US forces achieve victory in the Battle of Eniwetok Atoll, in the Pacific Marshall Islands.
23 Feb 1945 US Marines from 28th Marines, 5th Marine Division captured the summit of Mt. Suribachi on Iwo Jima, after days of intense fighting. Without realizing its significance, Associated Press photographer Joe Rosenthal snapped the world famous Iwo Jima flag photo.
23 Feb 1945 Allied Forces cross the Roer River [Operation Grenade].
Visit the World War II Timeline for day-by-day events 1939-1945! See also WW2 Books.



The M870A2E1, fielded in April 2004, is a 50-ton payload, three axle Medium Heavy Equipment Transporter (MHET) based on the M870A2 MEDIUM HEAVY EQUIPMENT TRANSPORTER (MHET) but with changes to increase its capacity:

  • Modified to transport wider/heavier loads (50-ton capacity)
  • Removable, hydraulically operated gooseneck for the front loading of equipment
  • "D" ring tie downs and folding outriggers for wide loads.

The M870A2E1 changes enable it to carry wider loads such as the M621B Scraper and Assault Amphibious Vehicles (AAV). At the time the M870A2E1 entered the Marine Corps fleet in 2004, the LVS MK48/16 prime mover with the M870A2E1 trailer was the largest motor vehicle in the Marine Corps.

M870A2E1 Semitrailer Characteristics

Length 507 in.
Height 48 in.
Width 120 in.
Vehicle Curb Weight (includes BII) 23,360 lbs.
Payload 100,000 lbs.
Maximum Speed 35 mph

Refer to the M870A2 MEDIUM HEAVY EQUIPMENT TRANSPORTER (MHET) page for other characteristics.

The full nomenclature for this trailer is MEDIUM HEAVY EQUIPMENT TRANSPORTER (MHET), M870A2E1. The M870A2E1 was assigned NSN 2330-01-483-8000.

The Operator's, maintenance and parts manuals for the M870A2E1 include:

  • TM-10770A-13&P System Operation and Maintenance First Through Third Echelon with Components List, Equipment Transporter MDL M870A2E1

The M870A2E1 was manufactured by Kalyn Siebert, Inc. (acquired by Heil).