Originally Posted by Emissary of Justice
All the tailed beasts did belong to Konoha. They were distributed as a gesture of good will to promote peace and balance amongst the villages.
You're almost correct....
By the time of the formation of the shinobi villages, Hashirama Senju, the First Hokage, used his Wood Release techniques to capture and give several tailed beasts to the other shinobi villages as peace treaties, in order to stabilise the balance of power between them. However, after Hashirama's death, the villages had trouble containing the beasts themselves and they began to run wild, so the villages instead moved to seal the tailed beasts within humans.
So I'm gathering he got what he could to gift, but not all. And they didn't 'own' them, they went out a hunting for the purpose of having something to gift.
So no Uchiha assisted in the gathering, and since they were being monitored, I'm guessing the many attempts at killing for MS was prior to them coming into the alliance with the Senju.
Btw KYF, no diss but the fastest Sasuke can move is within his Body Flicker, or Blitz, he has no T/S at all manga faktz. T/S users.... Tobirama, Obito, Hanzo, no one else in the manga has used it beyond what Kakashi can do. Not even Madara has been seen as able to do it.