Original: The Indo-Bangladeshi barrier or Indo-Bangladeshi border fencing is a 4,000-kilometer fence that India is presently constructing to seal off the Indian-Bangladeshi international border to prevent smuggling of weapons and narcotics and to prevent Pakistani military intelligence from using Bangladesh as transit for terrorists into India.
Simplified: The Indo-Bangladeshi barrier is a 4,000-kilometer fence that India is presently constructing to seal off the Indian-Bangladeshi international border from what was formerly East Bengal.