Ron Tyrrell reviews books that look at NZ involvement in war.

The Maori Battalion developed a fearsome reputation and this outstanding book shows how they differed from the rest of the division.
Ill-feeling persisted among these men divided by tribe and hapu from the land wars of the 1860s; martial traditions and strong extended family affiliations, largely Ngati Porou, had a great influence.
This spirit was exemplified in extensive farewells, the sending of Maori food to the Middle East, laments for the dead, and warm welcomes home.
This volume is a fine tribute to a company that was different.

Dominated by the tragedy of the torpedoing of the Marquette, with the loss of many nurses, other coverage is of Gallipoli (Lemnos), hospital ships and the Western Front.
This is a stark story of stressed medical services dealing with an overflow of young men with extensive wounds.

Unfortunately, the size, quality and number of the photographs do not match their importance in a book devoted to this subject.
Nevertheless, we are guided through the forms and idioms of war photographs, the interpretive possibilities and the contrast between battle scenes and the detritus of war.

Military chaplains played a courageous role.
Notably, a number stayed with their men to become prisoners of war, and Anglican chaplains returned home having imbibed an ecumenical spirit.
The story of pacifism is a useful record, which emphasises its unpopularity as well as a change in attitude for some as the circumstances of the war changed.

Jungle patrols were interspersed with sudden deadly skirmishes by a largely unseen enemy.
The stories are much alike: uncomfortable transport from New Zealand, attachment to an artillery, SAS or helicopter unit, service in Malaysia, Borneo and Vietnam, the trauma of handling serious casualties, and later careers with the army or in civilian life.
Surprisingly, there is little mention of Agent Orange or of the war's detrimental effects on the children and grandchildren of those who served in it.
• Ron Tyrrell is a Dunedin historian.