After the leaders of the village learned that the army of the Robber Fly colony had wiped out the Giant Hornet colony (without suffering any casualty), they decided to eliminate the Robber Fly colony. Around the same days, the village held a festival. During the festival the Robber Fly colony attacked. One of the members of a security council, Shisei Kaburagi, managed to fend off the attack on spectacular fashion. Things, however, feel very uneasy and unpredictable.
Episode 18 of From the New World was very spectacular but kind of confusing too. Things in the series have progressed in a predictable way after the monster rats started acquiring lots of knowledge. From here on things are probably going to be very chaotic. There is not much to analyze because this was a pretty straight forward episode. Probably the biggest question at this point is if Maria and Mamoru are helping the monster rats; I suspect they are. This episode gets a 9 out of 10.