Well lets start with geography, yes we are surrounded in all 3 sides by India, But Bangladesh's geography also makes us a defender's heaven.
Very small air space and a very small country where 80% of the land is inaccessible to anything heavier than 40 tonnes. So you see enemy tanks don't really threaten Bangladesh much. Which is why our army has a small armoured corps and emphasises more on ATGMs and APCs, to make themselves more mechanized. This is sort of our army;s way of combatting the threat of Indian tanks.
Now one of the main scenarios which the army thinks is most likely to get Bangladesh involved in a war with India, is an all out Indo-China war where India will want to use Bangladesh's territory to transport troops and supplies, but we will refuse and India will resort to using force. The army no doubt has a thousand other scenarios for an Indo-Bangla war, but in all of them the main strategy is the same, Defend every inch of soil and hold of the Indian military as long as possible until help or International pressure leads to an end of the Indian invasion.
Of course once again I would like to state that an I
ndo Bangla war is highly unlikely
But in the event of such a war it is a fact that it will be India who will be invading or starting the attack, because quite frankly we are not suicidal enough to invade India.
But you also have to consider how much of the Indian military will be facing us. I mean if it is even a solely Indo-Bangla war, the Indian borders with China and Pakistan will become very very tense and India will no doubt beef up mily presence in both those borders. Also International affairs have to be considered. Bangladesh has an image of being a peace loving country, secular Muslim country, so if India does invade us I think it is safe to say that they will be the ones facing condemnation and sanctions. While we will be flooded with aid and weapons from China, Pakistan and the Mid-East.