Why do you think, India surrounds us from three sides, and why do not you think that the effective BD-india border is only in our west with west Bengal? In times of conflicts, your military presene in the NE will be untenable for India. These troops will be isolated into many pockets in that region, because BD will not allow any supply connections of these isolated troops with the rest of india.
A marvellous deduction!
What exactly can Bangladesh do to ensure that it will not allow logistics to the NE?
It will be worth knowing!
That is, the reality beyond the daydreams!