▁his ▁willing ness ▁to ▁get ▁involved ▁in ▁the ▁struggle ▁as ▁Vas il ▁Lev ski ' s ▁deput y . ▁ ▁On ▁ 2 0 ▁August ▁and ▁ 2 1 ▁August ▁ 1 8 7 4 ▁Nik ola ▁O bre ten ov ▁took ▁part ▁in ▁BR CK ' s ▁session ▁in ▁Buch ar est , ▁which ▁re - elect ed ▁Kar avel ov ▁as ▁a ▁chairman ▁of ▁the ▁committee , ▁elected ▁H rist o ▁B ote v ▁as ▁a ▁secretary , ▁and ▁confirmed ▁Stefan ▁St amb ol ov ▁as ▁a ▁chief ▁apost le ▁in ▁Bulg aria ▁and ▁a ▁deput y ▁of ▁Vas il ▁Lev ski . ▁ ▁St ara ▁Zag ora ▁u pr ising ▁▁ ▁In ▁August ▁ 1 8 7 5 , ▁Nik ola ▁O bre ten ov ▁participated ▁in ▁BR CK ' s ▁sessions , ▁pres ided ▁by ▁H rist o ▁B ote v . ▁A ▁decision ▁was ▁made ▁for ▁Bulg aria ▁to ▁revol t ▁in ▁mid - Se ptember ▁ 1 8 7 5 . ▁The ▁country ▁would ▁be ▁divided ▁into ▁the ▁following ▁regions : ▁ ▁R ous se - Sh umen ▁region , ▁including ▁V arna ▁and ▁Raz grad ▁with ▁Nik ola ▁O bre ten ov ▁as ▁an ▁apost le ▁ ▁St ara ▁Zag ora ▁region ▁with ▁Stefan ▁St amb ol ov ▁as ▁an ▁apost le ▁ ▁T arn ovo ▁region ▁with ▁Mih ail ▁Sar af ov ▁as ▁an ▁apost le ▁ ▁Sl iven ▁region ▁with ▁T any u ▁Sto yan ov ▁as ▁an ▁apost le ▁ ▁Love ch -