its foundations in nine remnant Ottoman Army corps after the Armistice of Mudros at the end of World War I. After the rise of Turkish resistances (Kuva-yi Milliye) in Anatolia, Mustafa Kemal Pasha and his colleagues formed the Grand National Assembly (GNA) in Ankara on April 23, 1920, Kâzım Pasha's XV Corps was the only corps which at that time had any combat value. On November 8, 1920, the GNA decided to establish a standing army (Düzenli ordu) instead of irregular troops (Kuva-yi Milliye, Çerkes Ethem's Kuva-yi Seyyare etc.). On August 26, 1922, the Army of the Grand National Assembly (Büyük Millet Meclisi Ordusu) launched the general offensive known as the Great Offensive (Büyük Taarruz) against the Greek forces around Kara Hisâr-ı Sâhip. Nurettin Pasha's 1st Army and Yakup Şevki Pasha's 2nd Army encircled the main body of Major General Nikolaos Trikoupis's group and defeated it near Dumlupınar. Fahrettin Pasha's V Cavalry Corps entered Smyrna (Izmir) on September 9, 1922. Şükrü Naili Pasha's III Corps entered Constantinople (Istanbul) peacefully on October 6, 1923. Subsequent to the founding of the Republic of Turkey, the Army of the GNA was reorganized into three army inspectorates (ordu müfettişliği, 1st, 2nd and 3rd army inspectorate). First Kurdish rebellions and lead-up to WWII There were several Kurdish rebellions in the South-East of Turkey in the 1920s and 1930s, the most important of which were the 1925 Sheikh Said rebellion and the 1937 Dersim rebellion. All were suppressed by the TAF, sometimes involving large-scale mobilisations of up to 50,000 troops. Associated atrocities against civilians include the Zilan massacre. In 1935, Turkey purchased 60 T-26 modified 1933 light tanks from the USSR (also, two twin-turreted T-26 mod. 1931 were presented to the Turkish government in 1933–1934), along with about 60 BA-6 armoured cars to form the 1st Tank Battalion of the 2nd Cavalry Division at Lüleburgaz. The Armoured Brigade of the Turkish Army consisted of the 102nd and the 103rd Companies armed with the T-26 mod. 1933 tanks (four platoons in a company, five tanks in the platoon) at the end of 1937. The reserve group of the brigade had 21 T-26 tanks also. At the beginning of 1940, the Turkish Army had the Armoured Brigade in Istanbul, which belonged to the 1st Army, and the 1st Tank Battalion, which belonged to the 3rd Army. Turkish T-26 tanks were taken out of service in 1942. World War