Know Your Constitution: Subsidiary Alliance- Merits And Demerits Doctrine Of Lapse- Lord Dalhousie Revolt Of 1857 Early Indian Nationalism Montagu Declaration or August Declaration [1917] Montagu-Chelmsford Reforms or the Government of India Act 1919 Rowlatt Act, 1919 Jallianwala Bagh Massacre [April 13, 1919] The Khilafat Movement, 1919-1920 Social Changes in Modern India– NIOS