Twentieth century

During World War I, Plymouth was the port of entry for many troops from around the Empire and also developed as a facility for the manufacture of munitions. Although major units of the Royal Navy moved to the safety of Scapa Flow, Devonport was an important base for escort vessels and repairs. Flying boats operated from Mount Batten.

In World War II, Devonport was the headquarters of Western Approaches Command until 1941 and Sunderland flying boats were operated by the Royal Australian Air Force. It was an important embarkation point for US troops for D-Day. The city was heavily bombed by the Luftwaffe, in a series of 59 raids known as the Plymouth Blitz. Although the dockyards were the principal targets, much of the city centre and over 3,700 houses were completely destroyed and more than 1,000 civilians lost their lives. This was largely due to Plymouth’s status as a major port Charles Church was hit by incendiary bombs and partially destroyed in 1941 during the Blitz, but has not been demolished, as it is now an official permanent monument to the bombing of Plymouth during World War II.

The redevelopment of the city was planned by Sir Patrick Abercrombie in 1943 and by 1964 over 20,000 new homes had been built. Most of the shops had been destroyed and those that remained were cleared to enable a zoned reconstruction according to his plan. In 1962 the modernist high rise of the Civic Centre was constructed, an architecturally significant example of mid twentieth century civic slab-and-tower set piece allowed to fall into disrepair by and recently grade II listed to prevent its demolition.

Postwar, Devonport Dockyard was kept busy refitting aircraft carriers such as the Ark Royal. By the time this work ended in the late 1970s the nuclear submarine base was operational. The army had substantially left the city by 1971, with barracks pulled down in the 1960s, however the city has become home to the 42 Commando of the Royal Marines