At least 15 troops were killed in vehicle training accidents last year.
Joint Light Tactical Vehicle - JLTV
The Army began slowing its JLTV acquisition strategy last year.
The Defense Department on Tuesday awarded Oshkosh Defense LLC a contract for 2,721 more Joint Light Tactical Vehicles.
The Marine Corps is nearly doubling the number of JLTVs it plans to buy to replace its fleet of aging Humvees.
The Marine Corps will begin fielding new Joint Light Tactical Vehicles to Marine expeditionary units next month.
Three soldiers who were training with the New York National Guard were taken to the hospital for further evaluation.
Soldiers from the 3rd Infantry Division had the chance to test some improved features the Army has designed for the JTLV.
The secretary of the Army said the service could not rule out cuts to the service's Joint Light Tactical Vehicle program.
The under secretary of the Army said the service plans to buy fewer of the new Joint Light Tactical Vehicles in fiscal 2020.
A Marine Corps official said many of the Joint Light Tactical Vehicle's reliability and safety shortcomings have been fixed.