Pakistan Resolution in Sindh assembly
The Sindh assembly was the first British Indian legislature to pass the resolution in favour of Pakistan. Influential Sindhi activists under the supervision of G.M. Syed and other important leaders at the forefront of the provincial autonomy movement joined the Muslim League in 1938 and presented the Pakistan resolution in the Sindh Assembly in 1943.
Source: Wikipedia — Pakistan Resolution in Sindh assembly (CC BY-SA 4.0)