original_query: What actions were taken against the Japanese positions near Oivi?
query: What actions were taken against the Japanese positions near Oivi during the Kokoda Track campaign?
answer: The 16th Brigade initially attempted to break the Japanese positions near Oivi, but unsuccessfully.  Vasey then committed the 25th Brigade to an attack from the south towards Gorari, eventually leading to a Japanese rout and the capture of many artillery pieces.