Chakmas participated in the Indian Independence Movement. When India was partitioned, they never wanted nor demanded to part away from mainland India. In fact they only desired to remain under India which they strongly communicated to then Indian leadership and the Cycril Radcliffe Boundary Commission (committee appointed to supervise Partition). After India’s Independence on 15th August 1947, the Chakmas hoisted Indian national Flag with joy at Rangamati, the headquarter of CHT for seven days from 15th to 21st August 1947, but it was forcibly pulled down by the Pakistani Army on the eighth day.
Reason enough to say that Chakmas as a community have been loyal to India since time immemorial.