Two soldiers and a sailor at Wadham's Studio in Wildwood, New Jersey. The sailor is an Electrician's Mate. The soldier on the left is a member of the Medical Corps.
A German anti-aircraft unit set up in the woods. In the center is a Goertz rangefinder. My guess is that the device on the right of the rangefinder is a tachymeter use to determine deflection. At the far right is the telephone that would receive information from a forward spotter.
Whiz-Bangs was name given to German light artillery shells or in the case a group of musical clowns from New Zealand. This photograph was taken by H. J. Rouse in Christchurch.
Here is a member of the Aplini, specialized mountain troops. He still has the eagle feather in his hat so this photo was either taken before 1915 or he was far from the front at the time. 62 Alpini battalions were raised during World War One.