after re-reading the last chapters i realized that danzo was kinda talking big like:
"we ll have to take drastic measures" or "the clan will be annihilated" and i am like "does he believe what he is saying?"
the uchiha could easily win the civil war if that happened for the following reasons:
inability to use jichuriki and tailed beasts
the village had only naruto as a jinchuriki who couldnt fight and extracting the kyuubi would be something completely stupid since they didnt have mokuton and the uchiha had the sharingan
not enough kekkei genkai users
supposedly the village creates an army. 75% would be normal jonin and only 25% would be kekkei genkai users. the uchiha can copy any jutsu that is not kekkei genkai so they have the upper hand against this 75%
civillians would side the uchiha
the uchiha clan had been the police force that ensured the safety of many people for years and so they would like to support them in a way. dont forget that the uchiha massacre had always been treated like a tragedy and that many people considered itachi konoha's most evil personality
shisui and itachi vs hiruzen
the leading force of the army would be the 3rd hokage hiruzen sarutobi. we know from his battle against the 2nd and 1st hokage that genjutsu are his greatest weaknes. shisui and itachi were both mangekyou sharingan users and they could easily create a similar genjutsu that blinds the target. although i believe he could have killed them with high difficulty if they both cooporated they could win.
danzo was useless back then
no uchiha massacre.no sharingan.no izanagi.
danzo is just an average jonin without all these sharingan and his futon is useless before uchiha's katon
black ops openings
itachi was the leader of black ops so he knew all their tactics and could easily find openings and create a good strategy against them. he could also be a double spy from the uchiha's side and say something like "i ll kill them" and then prepare a surprise attack along with the rest uchiha
izanagi
uchiha would definately use izanagi in these situations and as we all know this jutsu is trully op.
the sanin were away back then
all of them had already left the village back then as the uchiha massacre took place after the 3rd shinobi war. tsunade was away at some random casino, jiraiya was "researching" new material and orochimaru had already left the village.
and that was about it. so what do u think?
sorry, i disagree. i'm going to go point by point off of what you said.
One: Inability to use Jinchuriki/Tailed Beasts Well, this was true for both sides. Neither could use jinchuriki or beasts to their advantage.
Two: Not enough Kekkei Genkai users well, first of all, if it was like you said and it was 25% KKG users, that'd actually be a lot and would be a huge advantage. even if it was less, it wouldn't matter. The Village is comprised of extremely powerful shinobis and we do not even know the extent of what their power was at that time. Also, for the Uchiha, we know there were very few who possessed MS. Most had regular sharingan, or no sharingan at all. a regular sharingan would not have given the villages many elite ninja to much trouble.
Three: Civilians would side with the Uchiha I highly doubt this. After all, the villagers want to have peace maintained, and they are not fools. therefore, they would know that such a coup, causing civil war, could lead to attacks from other villages. also, it would be Hiruzen and his men who evacuated the villages to safety. The villagers would side with the village, not the Uchiha who had a grudge against the village.
Four: Shisui and Itachi vs Hiruzen Sorry, but this would not have happened. they were BOTH against the Uchiha staging a coup d'etat. Also, Shisui had neither of his eyes. Danzo took one and he gave the other to Itachi, and this happened BEFORE the coup was planned to begin. As for Itachi, he would have either not fought or he would have taken Sasuke and run away from the village. he did not want to see a war happen and he was very against the Uchiha clan for plotting the coup
Five: Danzo was useless back then No, Danzo had always been considered an elite ninja and was an advisor to the Hokage even back then. Also, he already had Shisui's eye. so while he didn't have the other 10 sharingans on his arm, he still had one powerful Sharingan and was still a powerful guy
Six: Black Ops Openings It's true Itachi was a 'double agent' but again, he would not have fought in favor of the Uchiha's. He truly was against them and their plan for a coup.
Seven: Izanagi i highly doubt they'd have used Izanagi. First of all, they'd go blind in the eye which with they used Izanagi, which would leave them at a huge disadvantage for the rest of their life cuz they'd only have one sharingan. also, it's only useful for like 5 minutes. i really doubt they'd use izanagi cuz in going blind and having only one sharingan they'd lose a lot of power
Eight: Sannin were away back then Well, i'm not sure we can say for sure that Jiraiya wasn't there, but either way it wouldn't make a difference with the Sannin gone. the village had lots of elite shinobi and the village also knows the sharingan very well. not to mention, at that time, there were probably still Senju around who were the strongest clan (and even now there's probably still some left) as well as their successors who were also very powerful.
and yeah, Danzo was confident and did say the Uchiha clan would be annihilated either way, and i think he truly meant it.
so I believe the Uchiha would have lost the civil war and their coup would have failed. the only thing that would have saved them would have been an outside attack from Konoha's enemies--once they came in, the Uchiha would probably have allied with them. But, in a fight of the Village vs Uchihas, the Village would have won