The Arab-Israeli conflict persisted through two wars and ongoing border tensions. However, the Six-Day War of June 1967 was a cataclysm. Israel emerged victorious in a war with neighbouring Arab states and in possession of occupied territory. The Arabs were furious at this outcome and determined to regain their lands and dignity by again making war with Israel. Added to the mix was a resurgent Palestinian liberation movement. Renewed fighting began within weeks. It became a period of sustained combat, casualties, fiscal outlay, and diplomacy on the world stage unlike anything experienced previously. All involved militaries remained very active over these years with more consistent mobilisation, intensive training, and action than ever before. Each side deepened their dependence on superpower arms supply. The geopolitical stakes rose and Israel found itself fighting the Soviets indirectly on the borders and terrorists internationally. Adversary forces grew in size, adopted more complex weapons, and trained in new tactics, all in the tumult of combat of escalating intensity. The air forces of especially Israel and Egypt, then Syria, became particularly active, grew in size and capabilities. They employed some of the most advanced weapons the USA and the USSR arrayed in their Cold War confrontation. The air war grew to extensive air defences and long-range bombing plus deep photo reconnaissance. The danger of this sparking another general war with potential superpower involvement was high. This period is collectively referred to as the War of Attrition.