sentences:  After a winter of relative inactivity, the Romanian Navy took some defensive measures as well as performing warship upgrades, the monitors were fitted to fire French 120 mm rounds, which gave their main guns a range of up to 11 km.In July 1917, the Romanian monitors took part in an intense bombardment of Bulgarian-occupied Tulcea.The bombardment caused significant losses, the monitors fired until all enemy artillery batteries in and around the city were silenced, despite suffering light damage themselves.