Listen, judging the ground realities by looking at map could be hugely deceptive. At first consider two scenarios, first 1971 scenario. Then, 3 under strength division of Pakistan army totaling 45,000 troops was fighting an insurgency by dispersing their troops all over Bangladesh, on the hand, India crossed Bangladesh on 3rd December with 15 division troops(4 lakhs) plus 1.5 lakhs Mukti bahini was already fighting against Pak army. Pak army was totally demoralized, cut-off from their home base by thousands of miles, under constant ambush by Mukti Bahini, running short on arms and ammunition. On the other hand Indian army crossed in the best time of the year(December) for infantry movement, 70 million friendly people receiving them with open arms where ever they entering inside Bangladesh. Mukti Bahini is acting as a path clearer. Indian army's main objective was to rushing Dhaka bypassing pocket of resistance by Pak army. Despite all of these favorable condition, your army needed 13 days to reach on the vicinity of Dhaka due to numerous geographic obstacles. Coward Niazi promptly surrendered, but many historian agree that, if Niazi concentrated his troops in Dhaka and continued to fight by making it a fortress, then they could have resisted Indian army for at least a month. Meantime UN would have called ceasefire and they could have avoided surrender and returned to West Pakistan with dignity intact. But they squandered that chance due to extremely low morale.
Now comes to present days scenario, Our present armed forces are much more stronger compared to Pak army in 1971 in Bangladesh. We have 3 lakhs army personnel stationed all over Bangladesh in strategic positions. This time, 170 million people will not await Indian invaders with garland in hands, rather they will swell the ranks of army and ambush Indians by thousands. Geographic obstacles remain the same. Our mighty rivers and swampy land are our biggest strategic depth. In 1971, even under equipped and demoralized Pak army were able to put up resistance in many places in Bangladesh by taking advantage of the defensive terrain. Read some excerpt from this article-
Lessons to learn from India's PT-76 operations in 1971 Liberation War
https://defence.pk/pdf/threads/less...-76-operations-in-1971-liberation-war.616526/
The Pakistani army had entrenched itself in one fortified city after another, separated by large rivers that posed formidable obstacles to Indian tanks and heavy weapons
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However, not all of India’s attempts to use the PT-76's amphibious capabilities panned out. The 5th Squadron’s tanks repeatedly bogged down in marshes and fell behind the infantry. When they tried to ford the Meghna River on Dec. 12, the tanks’ hull seals proved leaky, forcing them to take an overland route instead.
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Furthermore, the lightly armored vehicles suffered losses to Pakistani 106-millimeter recoilless guns, even when making successful attacks.
Now tell me, how many days it will require Indian army to capture Dhaka now, if at all? it may look just 150-200 km, but ground reality is totally different. So, your complacency about India surrounding Bangladesh in 3 sides is totally hollow. In reality, Bangladesh almost severed your north-eastern states and created chicken neck security nightmare for you. Rather than boasting about capturing Dhaka in half a day, worry about how to defend north-east and chicken corridor in case someday China and Bangladesh act in unison and decide to obliterate that unnatural appendage hanging precariously on the other side of Bangladesh.
@bluesky @Sam.