Workers who train Army personnel in tank and armoured vehicle driving are to go on strike in a dispute over pay.
Members of the Public and Commercial Services union (PCS) at the Armour Centre in Bovington will walk out on Wednesday after rejecting a 2.4% offer from employers Babcock.
PCS industrial officer Paul Bemrose said:
"These staff provide essential support to the frontline. In recent years they have consistently been presented with pay rises that fall short of cost of living increases.
"At the same time Babcock has seen its profits grow by 79%, largely off the back of lucrative government-funded defence contracts."
PCS general secretary Mark Serwotka added:
"The Babcock members are standing up for a decent pay rise for all staff and are right to highlight the profits made by the company which are not being shared more evenly with the staff.
"These staff provide a vital training service for our armed services and should not be paid on the cheap for doing so."
Union members voted for strike action by 81% with a turnout of 61%.