Istanbul was officially occupied on March 16, 1920 and the Ottoman Parliamentary Assembly was raided on March 18. The occupation of Istanbul and the raiding of the Parliament ended de facto the Ottoman Empire. These developments gave legitimacy to the opening of a new parliament in Anatolia. As a result of the elections, the Turkish Grand National Assembly (TGNA) was opened in Ankara on April 23, 1920. Mustafa Kemal Pasha became the Speaker of the Assembly and the Government of the Parliament was established at the beginning of May. The First Period of TGNA was a veteran parliament, which carried out and succeeded the National Struggle. A feature of the First Period of TGNA was its representing almost all of Turkey. There were 115 public officers and retired people, 61 hodjas, 51 soldiers, 26 farmers, 37 merchants, 49 advocates, 51 physicians, 8 sheikhs, 6 journalists, 5 aghas, 5 tribesmen and 2 engineers in the Parliament. There were differences of opinion in TGNA. However, the main aim of all deputies was to achieve the Turkish National Struggle.