In the early 1980s, Taiwan initiated the Indigenous Defense Fighter (IDF) development project to sustain air superiority over the Taiwan Strait as the potential threat from the other side of the Strait had been escalating.In the early 1980s, Taiwan initiated the Indigenous Defense Fighter (IDF) development project to sustain air superiority over the Taiwan Strait as the potential threat from the other side of the Strait had been escalating.In the early 1980s, Taiwan initiated the Indigenous Defense Fighter (IDF) development project to sustain air superiority over the Taiwan Strait as the potential threat from the other side of the Strait had been escalating.