Damn, they escaped.
CLAY WALLS
Nah, that would take way too long and wouldn't actually solve the problem permanently.
Okay, here is what I think we should do.
Have a funeral for the dead, treat the wounded (bandages and all that), then present to the tribe a means of defending the village.
Give speech to tribe: We are met on a great battlefield. We have come to dedicate a portion of that field, as a final resting place for those who here gave their lives that we might live. It is altogether fitting and proper that we should do this.
But, in a larger sense, we can not dedicate, we can not consecrate, we can not hallow this ground. The brave men, living and dead, who struggled here, have consecrated it, far above our poor power to add or detract. The world will little note, nor long remember what we say here, but it can never forget what they did here. It is for us the living, rather, to be dedicated here to the unfinished work which they who fought here have thus far so nobly advanced. It is rather for us to be here dedicated to the great task remaining before us—that from these honored dead we take increased devotion to that cause for which they gave the last full measure of devotion—that we here highly resolve that these dead shall not have died in vain—that we shall triumph over our adversaries, and see their unjust aggression halted for all time.
(end of speech. I thought it proper to adapt portions of the Gettysburg address as a funeral speech, because that is what leaders do, give speeches, and that was a damn good one. Also, I feel like if we gave such a speech it would increase our status among the tribe.)
After the funeral speech promptly lay out the following plan to the tribe, lay it out as a permanent solution to our conflict, as a way to ensure that we need never see another one of our children die.
Now we move to the attack plan. Many of their men will have died or been injured during the fighting. Before nightfall, have non-injured and non-child members of the tribe repair their weapons, and sharpen their rocky tips. Have them also cover themselves in clay, preferably of a red color (I assume we are black, so that would standout well against our skin during the night. see where this is going yet?). While the tribe is doing that, take your most trusted companion with you and follow the attackers back to their camp. When night falls, march to the camp, go into their huts/tents/whatever and kill half of the tribes adults, quietly, while sparing the children. we will then march the people we did not kill back to our camp, to decide what we will do with them latter. Also, make sure you kill any of the adults if they had killed anyone from our tribe.
If we can defeat this other tribe, we can be set up as the regional hegemon, and will have eliminated a significant local threat.
Also, given that we just killed a bunch of their warriors, we should not rest on our laurels.