I think in case of genocide and war, which the two kindda go hand in hand, if we bring the leaders of the opposing factions face to face on neutral location for negotiation, that might work better. The words might carry more words if we had stay neutral. The way I see it, if we impose some kind of military forces on either side, there is no guarantee the war will stop. And not only that we could possibly worsen the conflict by killing innocent civilians. Whether it was intended or not doesn't matter much. Think of a psychological affect a foreign military forces occupying their homeland. People won't like it. How would you like it if Russia set up a large military bases on U.S. soil? It nearly started World War III when the Soviet Union place nuclear missiles on Cuba.