History Early days -LRB- NUMBER@1 -- NUMBER@2 -RRB- HammerFall began when guitarist PERSON@1 quit Ceremonial Oath and invited PERSON@2 -LRB- from In Flames , also formerly a member of Ceremonial Oath -RRB- to join him as a drummer on a new musical project which he had been idealising for some time .

History NUMBER@3 HammerFall began when guitarist PERSON@1 quit Ceremonial Oath and invited Jesper Strömblad from In Flames to join him as a drummer on a new band he had been thinking about for a long time .
