Khulna Division is a region in Bangladesh.
Famous for its thriving shrimp industry and the Sundarbans.
During the Pakistan period Khulna division included the Barisal Division then as district of East Pakistan.
Coming from Kolkata you're likely to arrive in this division. The border town of Benapole is the most used, and has a couple of hotels but if you can it's more pleasant to forge on and stay in Jessore.