From the link
Manichaean ideas undoubtedly had a major effect on the development of Christianity.
In particular Gnostic Christians held similar Dualist ideas. The Pauline line of Christianity that developed into what we now call the Orthodox and Catholic Churches was also influenced. It absorbed a number of characteristic Manichaean ideas that are not generally recognised as such. A few examples are the God of Light locked in battle with the “god of this world”, along with their armies of light and darkness respectively, with human beings as combatants on either side.