In reviewing the Wiki topic on War of annihilation it is clear that there have been several examples (many of them in recent history) wherein the goal of a war was to utterly destroy an enemy by eradicating them from existence. But has any such war, at any time in recorded history, ever succeeded in that goal? Has a complete civilization ever been utterly destroyed to the last person through warfare?
The Wiki article mentions the Herero uprising, Nazi warfare, and other examples as extreme cases of total war wherein it could be argued that complete and utter eradication of a people was the goal, rather than conventional socio-polictical reasons or economical or territorial pursuits or natural resources were the stakes. But none of the examples given succeeded in their radical goals of completely killing everyone.
I have performed several additional Google searches looking for cases where the utter destruction of an enemy was either the goal or the outcome, but have not yet found a case where a war did not end in capitulation of some sort by the losing side in the conflict, or some survivors escaped destruction. So far I have not found a case where everyone was killed, but I think there may be one or more to be found (I have no reason to believe this other than as an observation of our human nature - it seems inevitable that this has occurred at some point in human history).
Destroying a government or empire or kingdom and its cities and infrastructure would not meet the requirements I am seeking, unless also the entire civil population was slain, instead of taken captive or sold into slavery or left to suffer in a devastated wasteland. What I'm looking for is an example where not just the empire or the military or the cities and resources of an enemy were destroyed, but also every many woman and child slain - not taken captive or sold into slavery or otherwise dominated by the victor - but totally annihilated - slain - killed.