In which of the following movement Gandhiji for the first time used hunger strike as a weapon to get justice?

Ahmedabad Mill Strike, 1918 was one of the initial
movements led by Gandhi in the beginning of 20th
century after his return from South Africa. In this strike
Gandhiji used hunger strike as a weapon to provide justice
to the workers of the cotton mill. The result was that the
strike was successful, and the workers got a 35% wage
increase.