Bangladesh defeated India by 79 runs in the first One-day international in Mirpur on Thursday and took a 1-0 lead in the three-match series.
It was only the fourth time in a bilateral match that they beat India (against 25 loses) in 30 matches.
It was also their ninth straight win at home and Bangladesh's joint-second-largest victory over a Test team, not Zimbabwe.
Chasing an imposing 308 for victory, the Indians made a steady start before losing wickets in a heap and were bundled out for 228, with four overs to spare.
Openers Rohit Sharma (63 off 68) and Shikhar Dhawan (30 off 38) stitched a 95-run stand for the first wicket, while Suresh Raina, with a run-a-ball 40, and Ravindra Jadeja (32 off 42) also tried their bit to save the day for India but it was not to be.
Debutant Mustafizur Rahman (5-50) turned out to be the hosts' star performer with the ball, picking up a fifer in his first international match. He was supported well by pace partner Taskin Ahmed (2-21) and Shakib al Hasan (2-33).
Earlier, India's bowlers took a beating as Bangladesh's top-order produced good batting to post a challenging 307 in 49.4 overs.
In the process, the hosts posted their highest score against India in ODIs, surpassing the previous best of 296 for 6 at the same venue in 2010.
Openers Soumya Sarkar (54 off 40 balls) and Tamim Iqbal (60 off 62 balls) added 102 runs for the opening stand in only 13.4 overs to lay a solid foundation.
Shakib al-Hasan (52 off 68 balls), Sabbir Rahaman (41 off 44 balls) and Nasir Hossain (34) then batted well in the middle-order to give Bangladesh a substantial total.
Ravichandran Ashwin (3-51 in 10 overs) was India’s most successful bowler, even as Umesh Yadav (2-58 in 8 overs) and Mohit Sharma (1-53 in 4.3 overs) were taken apart by the Bangladeshi batsmen.
Ravindra Jadeja (1-48) was good in patches while Bhuvneshwar Kumar (2-37 in 7 overs) had a decent outing.
The Indian bowlers redeemed themselves somewhat in the final 10 overs in which Bangladesh scored only 57 runs and lost the last five wickets for 40.
Bangladesh openers Sarkar and Tamim started in whirlwind fashion after their skipper, Mashrafe Mortaza, opted to bat on a good surface.
While Tamim played and missed a lot during the first few overs, Sarkar was more assured with his footwork as he repeatedly lofted Bhuvenshwar and Yadav over the in-field. There were some lofted cover drives as well as pull-shots in the arc between mid-wicket and square leg.
When Ashwin was initially brought into the attack, Sarkar lofted him over deep midwicket for a huge six. His coveted half-century came off 38 balls when he just guided a delivery from Mohit over keeper's head for a one bounce four.
To be fair to Tamim, once he got a couple of boundaries, he also matched his junior colleague stroke for stroke even though Sarkar's batting was more pleasing to the eye.
The floodgates for the senior pro opened in the sixth over of the innings, bowled by an erratic Yadav. It yielded 18 runs. The Vidarbha pacer bowled all over the place as Tamim guided the bowler to the third man for a boundary, followed by a slashed boundary over point and then grilled him past mid-on.
As if to complete the humiliation, he danced down the track to lift him over cover for a six.
The Indian bowlers looked clueless as 100 came up in the 13th over before a smart work from Suresh Raina in the field saw Sarkar head back towards pavilion for a well-made 54 off 40 balls with eight fours and a six.
Tamim was, however, unfazed as he completed his 30th half-century in ODIs with a boundary off Mohit and followed it up with another four. His 50 came off as many deliveries.
However, on a personal score of 60, he danced down the track to loft Ashwin but only found Rohit Sharma at the long-on boundary.
Tamim's innings had eight hits to the fence and a maximum to go with it.
From 102 for no loss, Bangladesh quickly slumped to 146 for four as debutant Litton Das (8) and Test captain Mushfiqur Rahim (14) were dismissed cheaply by Ashwin.
But then Shakib was joined by Sabbir and the duo first arrested the slide and followed it up with some clean hitting. They added 83 runs for the fifth wicket to take Bangaldesh score close to 250 by the start of the final 10 overs.
Once Sabbir was cleaned up Jadeja, seasoned Shakib carried on hitting the occasional boundaries and running well between the wickets.
Shakib's was a patient innings in contrast to the openers as his 52 came off 68 balls with three boundaries before Yadav finally got a wicket.
Towards the end, skipper Mortaza (21 off 18) also played a good hand for the hosts.