It had however meant unremitting vigilance, constant patrolling (including many incursions across the river into enemy country) and frequent raids: all under the most wretched conditions of ground and weather.
This leads to the formation of a slow-moving long wave that creates mountain-parallel, ageostrophic flow, causing incursions of high-latitude cold air.
As the guerrilla war intensified, however, it became clear that civilian police alone were not enough to cope with SWAPO incursions and escalating unrest.
