War to the Knife by Rolf Boldrewood

The campaign dragged on till June, the antipodean mid-winter, was reached. Dark were the long cold nights, ceaseless the rain, as the troops and volunteers struggled through forests knee-deep in mud, with creeks to ford and flax swamps to wade through.

An insufficient commissariat tried the constitution of the hardiest. Massinger was now in a position to comprehend thoroughly the fearful odds against which the British regulars fought in the American revolutionary war. There they confronted an enemy whose very children, as soon as they were strong enough to lift the long rifle of the period, were the deadliest of marksmen.