The victory in 1945 ended the scourge of the Neuroi as flying titans of the sky, but seeing as how man has fought them since the beginning of time, it should have been obvious that this victory would not be the end of them. The neuroi have adapted throughout the timeline of earth, originally taking the forms of dragons and monsters, they then took the forms planes and tanks. But the next adaption was one they could not have expected, the monsters of the sky, practically invincible and capable of singlehandedly destroying entire cities, transformed to mimic that of human infantry, small units capable of ambushes and other forms of guerilla warfare took the stage. This adaptation changed the way war was fought, no longer would grand armies of tanks, artillary, and waves of soldiers fight in a huge conflicts, now men fought in small groups, either stalking or being stalked in forests or towns, the enemy never being visible till the shooting started. The new method of warfare obviously had drastic affects on how witches were used as well, the idea of dogfighting had ended, leaving jet bombers the only witches left in the sky, and while tank witches retained some use on the ground, as they weren't much bigger than a person and could move through light forest and cities, they were not able to move through heavily forested areas and were not able to operate in buildings. So the world turned to predominantly training witches as infantryman.
The most memorable example being the disaster in Galian Indochina. In 1955 neuroi suddenly appeared randomly throughout the region, ambushing towns and villages. Originally the conflict was being handled by Galian forces, however as the attacks ramped up it became obvious this was an international threat. In 1957 the Fuso Empire, Empire of Orussia, and the Republic of China dedicated forces to the region, and in 1960 Liberion entered the war. After failure after failure the campaign finally ended in 1975, resulting in a total evacuation of Galian Indochina.