1826 · Auspicious Incident (Revolt) — The janissary revolt was crushed and the Janissary corps abolished (17 June 1826)
17 June
1393 · Veliko Tarnovo (City) — After a long, fierce siege Bayezid I retook the city on 17 June 1393; the capital of the Bulgarian tsardom became Ottoman.
20 June
1455 · Prizren (City) — On 20 June 1455 the army of Mehmed the Conqueror took the city after fighting Đurađ Branković; Prizren became a district capital.
1459 · Smederevo (City) — On 20 June 1459 Helena, widow of Lazar Branković, surrendered the fortress to the Ottomans; the Serbian despotate ended.
1920 · Tekirdağ (City) — On 20 June 1920 the Greek army occupied the city.
22 June
1919 · Amasya (City) — On 22 June 1919 Mustafa Kemal Pasha issued the Amasya Circular, the first manifesto of the War of Independence, here.
23 June
1939 · Antakya (City) — After the period of the Hatay State it joined Turkey under the agreement of 23 June 1939.
24 June
1877 · Veliko Tarnovo (City) — In the Russo-Turkish War of 1877–1878 the Russian army took the city on 24 June 1877.
1921 · Izmit (City) — The city was liberated on 28 June 1921.
30 June
1798 · Alexandria (City) — On 30 June 1798 the French besieged and took the city.
1920 · Balıkesir (City) — On 30 June 1920 the Greek army occupied the city.
Dates are given as in the sources; dates before 1582 are mostly Julian. Event dates come from Wikipedia infoboxes, city events from the city articles of the TDV Encyclopedia of Islam.