On a backpacking trip in the Sierras years ago [Kings Canyon], I observed a regimented column of 1/4" long black ants marching across the trail. They were in rigid formation, six-ants-per-line, and, by my estimation, roughly 5 meters in length. They were moving quickly. I traced the line off the trail and back to its end, then back to the head of the line again, careful to avoid interfering with their unknown [to me] objective. About three meters off the other side of the trail was a clearing in which there was a fallen tree, maybe from years before. At a point well up from the trunk andexposed roots, there was a large separator between the bark of the tree and the wood beneath, like a wide cave. Sentries of another ant species [these had red heads and black bodies] were a little larger, and were at the entrance and ran back under the gap, and immediately, a bunch came running back out, by which time the attacking ant group, was yup on the log, approaching the "cave" opening. The battle engaged, violently. The black ants had larger pincers than the others, inspire of the letters slightly larger size, and heads were being clipped off with atrocious ease. The attacked group was losing badly, allowing a steady stream of attacking ants into the nest of the victims. Soon, I observed black ants coming back out, with hostage eggs in their pincers, no longer in rigid formation, and running fast. By this time the enter attacking army was on the log, and many of them were successfully running back down tyke log with captured eggs. After a few minutes observing the one-sided mayhem, I followed the departing victorious ants back to their side of the trial, and off into the woods tow3ard, I presumed, their nest, which was at the base of an upright tree.other blacks ants, still in their nest, came rennin g out to greet the victorious warriors and their spoils, and all enjoyed a great feast. I was watching group intelligence, at least, with clear communication between them, and a regimented attack that had obviously been practiced successfully on occasions in the past, because this attack was an utter blitzkrieg. I left the victorsat their nest5 and walked back to the losers, who were, those left alive, in a frenzy, hurrying about their galled, dismembered comrade. Utter defeat, but not ado much as decimating the tribe. The survivors would be subject, I was sure, to a subsequent attack when a new food source was "prepared."