Complex sentence: Bardia did not become an important port as supply by sea continued to run through Sollum but became an important source of water, after the repair of the large pumping station that the Italians had installed to serve the township and Fort Capuzzo.
Split into simpler sentences: Bardia did not become an important port as supply by sea continued to run through Salum. Bardia became an important source of water, after the repair of the large pumping station that the Italians had installed to serve the township and Fort Capuzzo.