Complex sentence: Nagoya Airport was opened in 1944 as a military airport named Kamake Airfield, it was attacked on several occasions in 1944 and 1945 by USAAF B-29 Superfortress bombing raids.
Split into simpler sentences: Nagoya Airport was first opened in 1944 as a military airport named Kamake Airfield. As such, it was attacked on several occasions in 1944 and 1945 by USAAF B-29 Superfortress bombing raids.