The 31 March incident was an uprising in the Ottoman Empire in April 1909, during the Second Constitutional Era. The incident broke out during the night of 30–31 Mart 1325 in Rumi calendar, thus named
Deputies of the parliament in Thessaloniki
The murder of Hasan Fehmi, editor-in-chief of the anti-CUP newspaper Serbestî, in the days preceding the mutiny acted as a catalyst for unrest.
Taşkışla barracks at Taksim following the suppression of the uprising
Ahmed Rıza Bey was a Turkish activist, intellectual, politician, author, educator, polymath, and a prominent Young Turk. He was an early leader of the Committee of Union and Progress.
Rıza in 1909
Ahmet Rıza in his early years
Rıza was highly influenced by Auguste Comte's and his works