Complex sentence: Chemical, nautical, geological, and forest management applications followed after the end of the Great Patriotic War, operating from the rapidly developed airfields around the Primorye region, which later served as the basis of the modern airports constructed from the 1960's onwards.
Split into simpler sentences: Chemical, nautical, geological, and forest management applications followed after the end of the Great Patriotic War, operating from the rapidly developing airfields around the Primorye region. Many of which later served as the basis for modern airports constructed from the 1960's onwards.