A court martial is being held at Ōhakea for two airmen charged with multiple drug charges. (Google Maps)

A court martial is being held for two airmen facing charges of supply and consumption of drugs.

The New Zealand Defence Force says the court martial will take place in February at Ōhakea Air Force Base.

Courts martial held for drugs are not uncommon in Manawatū, with a range of military personnel going through the process in the past few years.

A group of eight soldiers were taken into custody during Labour Weekend in Palmerston North, 2015, after they were found acting strangely in the city centre and were suspected of being under the influence of drugs.

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The drug is understood to have been the synthetic hallucinogen N-bomb, which triggered a psychotic reaction in the men.

Of those eight, three went to a court martial, with the other five dismissed from the military.

One soldier was dismissed from the army and sentenced to 90 days' Defence Force detention. Two others were found guilty and fined and kicked out of the military, however, their convictions were quashed on appeal.

Also in 2015, a soldier who admitted using cannabis oil was sentenced to 28 days in a detention centre at Burnham Military Camp after pleading guilty during a court martial at Linton Military Camp to five drug and alcohol-related charges.

A court martial is the military equivalent of a civilian court, which tries cases where a breach of military discipline or other offences may have occurred.

Information released under the Official Information Act in 2017 showed how almost 100 courts martial had been held in the past 17 years, with the cost to taxpayers stretching well past $1 million - at an average cost of $17,200 each.

Not included in the Defence Force costs was the remuneration of the District Court judges who may preside over a court martial.

And a disciplinary crackdown at Linton Military Camp in Manawatū is a small, but high-profile part of that.

Of the 99 courts martial, 28 were held at Linton Military Camp for a range of charges under the Armed Forces Discipline Act, Crimes Act, the Misuse of Drugs act and the Psychoactive Substances Act.

Linton Military Camp is the biggest out of all the military bases in New Zealand.

Other courts martial held at Linton during 2016 included one for a captain who failed to store two pistols securely and a Waiouru soldier accused of ill-treating subordinates.

The camp with the next-highest number of trials was Trentham Military Camp, Wellington, 23, then the naval base at Devonport, Auckland, 21, Burnham Military Camp, Christchurch, 12, and Waiouru Military Camp, 7.

Whenuapai Air Force Base in Auckland had three, Papakura, one, Ohakea Air Force Base, one, Wellington, one, and two trials were overseas.

Possible sentences under a court martial are prison and automatic dismissal from the forces, detention at Burnham military prison or within other camps, demotion, severe reprimand or a fine.

Stuff revealed in 2017 how people convicted of crimes in a Court Martial did not have the convictions shown on their civilian records.