A Chain is back to back attacks stacked with fac member attacks, they give bonus respect based on chain # with 10 and 25 being considered as a completed chain so 10th and/or 25th attack must be in fac war to be counted this number can be increased as out fac grows in respect, however attacks 1-9 and 11-24 can be any random or even mission attacks.
Fac=Faction