Complex sentence: Reliefs on the Beckenham War Memorial in the High Street of Beckenham in Kent memorialize 707 men who were killed in the 1914--1918 conflict, 300 men of Beckenham who died in the 1939--1945 war, and 330 civilians who died in the same war.
Split into simpler sentences: Reliefs on the Beckenham War Memorial in the High Street of Beckenham in Kent. This memorial remembers the 707 men who were killed in the 1914--1918 conflict and the 300 men of Beckenham who died in the 1939--1945 war as well as 330 civilians who died in the same war.