"To the left", the attack on the men defending the Servia Pass had started. The 4th New Zealand Brigade was between Kastania and Prosilion. This was an area with very steep slopes. This lay beyond "a very steep escarpment". Below the escarpment, the land sloped down to the river. The river was probably from two to four miles away. The elevation at the river was about two thousand feet lower.
The escarpment had a gap in it. The gap was about 500 yards wide. The main road passed through the gap in the escarpment. The New Zealanders "were located on the south side of the gap."
The New Zealand battalions "had been digging in since dawn on 11 April". You would find the 18th New Zealand Battalion was sitting "north of Lava". The 19th New Zealand Battalion was "on a front astride the pass".
The 19th and 20th New Zealand Battalions each had "two platoons of the 2/1st Machine Gun Battalion". One of these was sitting forward with the infantry "in the pass itself".
By "15 April, there was more artillery available, such as from the 7th Medium Regiment and the 64th Medium Regiment. There was also the 6th New Zealand Field Regiment." This is based on the account in "Greece, Crete, and Sytia" by Gavin Long.