Many TB fanboys won't like it, but as I mentioned earlier, once the foreign enemy is out, the next fight will be between former comrades in arms.
You talk as if if you discovered something new. A country ravaged by war over 40 years would not be expected to suddenly became haven of peace and oder.
Often countries which have gone through such events see burning embers of discontent continue. In 1923 after the Irish had succeeded in rising up against the British and got their free state the movement split and Collins was killed. It took more years for those who split from the mainstream to be suppressed. They would go on to form the IRA. Then in 1998 after the Friday Peace accords the IRA signed peace agreement giving up armed resistence.
Even then a splinter broke off called the Real IRA which still exists and has continued on path of resistence and armed struggle. Wars are messy. Civil wars are even more messy. Keep that in mind.