Complex sentence: The RAF attack on Feb.21 was aimed at the main railway station on the edge of the inner city, and at chemical plants southwest of the inner city, but also destroyed large areas of the city centre.
Split into simpler sentences: The RAF attack on Feb.21 was aimed at the main train station, on the edge of the inner city, and at chemical plants southwest of the inner city. The attack, however, also destroyed large areas of the city centre.