This has best been seen with the IRA. In the 70's and 80's, Loyalists who believed the British government was going to give in to the IRA took up arms against the IRA. For every IRA attack that took place, a Loyalist one followed. This is not to mention that in the 90's, the Loyalists performed a number of assassinations on seemingly "untouchable" IRA suppliers, members and sympathists. Over this period, the UVF actually killed more people than the IRA did, although this is over-looked. When the number of IRA attacks went down, so did that of the Loyalists, until the "peace" agreements a few years ago. Splinter factions of both will continue to attack eachother, but they know that the IRA will never achieve the goal it set out to do.