Trunk linking Wellington and Auckland, the North Island's most important line. In 1917, NZR withdrew dining cars from its passenger trains due to World War I economic difficulties and Paekākāriki became a main refreshment stop on the trip north; originally a temporary measure, the dining cars did not return for decades and Paekākāriki's status remained until the 1960s. From 1940 the line south to Wellington through the new Tawa Flat deviation was electrified and at Paekakariki engines were changed, with a steam engine depot at Paekakariki. Electrified commuter services were also extended to Paekakariki. The locomotive depot gradually declined in importance due to changing motive power, and nowadays only FP/FT "Matangi" class electric multiple units are stabled here. The old steam locomotive depot is now the location of "The Engine Shed", the base of Steam Incorporated, one of New Zealand's premier railway preservation societies. The Paekakariki Station Precinct Trust has been established to manage the station area, including the museum and Steam Incorporated's depot, and firmly establish it as a historical and tourist attraction. During the Second World War Paekākāriki served as a major base for US Marines fighting in the Pacific Campaign. There were three main camps, all situated in or adjacent to present-day Queen Elizabeth Park. At the height of the occupation there were over 20,000 Americans stationed in the region, significantly outnumbering locals. The camps were used for training purposes, as well as rest and recreation for those returning from the Pacific combat zone. Paekākāriki's steep surrounding hills proved suitable terrain for marching and mortar practice, whilst its beaches were used to stage amphibian invasions. They were the scene of an unfortunate tragedy in June 1943 when a landing craft was swamped by a wave during a nighttime training exercise. Nine men drowned in the heavy surf according to official figures; local rumour put the toll higher. The incident was not reported at the time due to wartime censorship provisions. While the American base in Paekākāriki was only in existence for a few years it had an important and lingering impact on the region. Several local place names remain as reminders of this wartime presence. Tarawa Street, for example, commemorates one of the bloodiest battles of the Pacific War which locally based marines fought in directly after the camps were abandoned in October 1943. Demographics Paekākāriki is defined by Statistics New Zealand as a small urban area