Complex sentence: The Soviet Union developed the Ilyushin Il-38 from a civilian airliner, and the Royal Canadian Air Force did likewise, deriving the Canadair CP-107 Argus from a British airliner.
Split into simpler sentences: The Soviet Union developed the Ilyushin Il-38 from a civilian airliner. Similarly, the Royal Canadian Air Force derived the Canadair CP-107 Argus from a British airliner.