Executive Committee member in 1920. The Field of Mars continued to be used as a military parade and training ground during this period, hosting a review of the first "red officers" on 18 September 1918. On the first anniversary of the October Revolution the Field of Mars was renamed the "Victims of the Revolution Square", and was sometimes called "The Square of the Graves of the Victims of the Revolution." The layout of the square was further developed following the installation of the monument, with gardens and pathways to the design of Ivan Fomin. The first Subbotnik, a Saturday devoted to volunteer work, was held on 1 May 1920, with 16,000 city inhabitants working to plant more than 60,000 bushes and trees on the square, laying paths and alleys, and removing waste. On 19 July 1920 the Field of Mars was visited by delegates of the 2nd World Congress of the Comintern, led by Vladimir Lenin. The redesign was completed in 1921, and on 25 October the square was transferred to the city's Garden and Park Administration. In 1922 the Comintern and the All-Russian Central Executive Committee proposed creating a monument to the October Revolution, but the project was never carried out. The last burial on the square, that of the secretary of the Leningrad city committee of the CPSU , took place on 8 October 1933. Wartime use and postwar memorial The square was laid out with vegetable gardens during summer 1942 to help feed the city during the siege of Leningrad. There were also six anti-aircraft batteries located on the field, as well as trenches to provide shelter from bombardments. The square's former name, the Field of Mars, was restored on 13 January 1944. It underwent further reconstruction between 1947 and 1955, with an eternal flame lit in the centre of the square on 6 November 1957, in memory of the victims of various wars and revolutions. The flame, lit from the open-hearth furnace of the Kirov Factory, was the first eternal flame in Russia. The flame from the Field of Mars was also used to light the eternal flame at the Piskaryovskoye Memorial Cemetery on 9 May 1960, and at other memorials in Saint Petersburg. The flame was delivered to Moscow in 1967 and on 8 May lit the eternal flame on the Tomb of the Unknown Soldier near the Kremlin Wall. Post-Soviet period The square was