in december 1990, bangladesh was celebrating the downfall of the autocratic ershad regime and various organisations were celebrating in their own ways. in the same spirit, bamba decided to do a day-long concert at the dhaka university campus. president of bamba, mac haque called on all members of bamba to get ready for the show. however, the pre-requisite was that the show must completely be in bengali language. this caught the four metal bands completely off-guard since until that time they always covered english heavy metal songs from international bands and did not have original bengali materials of their own. this apparent obstacle however turned out to be a blessing in disguise for all the heavy metal bands and especially for rock strata since this forced them to come up with heavy metal songs using the bengali language. this had never been done before successfully. undaunted by the lack of precedents, all the metal bands including rock strata decided to write their own first ever bengali songs of heavy metal genre. it was at this time when the historic heavy metal bengali songs like shamanno dusshopno, shesh ratri, nuclear shadhintota, shaadhikar, ekti chele, ei raate were written and composed and history was in the making.