Complex sentence: Two infantry companies attacked'B' Company 9th Parachute Battalions position, this attack was more determined and even naval gunfire support from the 6 inch (150 mm) guns of HMS "Arethusa" did not stop the attack and they reached the company's lines.
Split into simpler sentences: Two infantry companies attacked'B' Company 9th Parachute Battalions position. This attack was more determined and even naval gunfire support from the 6 inch (150 mm) guns of HMS "Arethusa" did not stop the attack and they reached the company's lines.