</p>
<p>In 1974, the <a href="//en.wikipedia.org/wiki/Portuguese_empire" title="Portuguese empire" class="mw-redirect">Portuguese empire</a> collapsed and Namibia's border with <a href="//en.wikipedia.org/wiki/Angola" title="Angola">Angola</a> opened up. Nujoma recognized that this paved the way for major changes in the way the war was being fought and over the next two years SWAPO's military campaign shifted its base from Zambia to Angola. The opening of the border enabled thousands of SWAPO supporters to 