All this changed for Obito during the Battle of Kannabi Bridge in the Third Shinobi World War, where half of his body was crushed in a collapsing cavern, and he was forced to accept his fate.

Source: https://gamerant.com/naruto-how-did-madara-prepare-obito-as-his-successor/

Despite his efforts being in vain initially, Obito did not give up as he earnestly fought against Madara to help the Allied Shinobi Forces.

Source: https://gamerant.com/naruto-were-obitos-actions-worthy-of-redemption/

Despite his rivalry with Kakashi, Obito had no darkness in his heart until Madara saved him from the collapse.

Source: https://www.cbr.com/naruto-madara-best-quotes/

He totally wiped them out with the help of Obito on the condition that they would let him keep his younger brother, Sasuke, alive.

Source: https://gamerant.com/naruto-characters-with-most-kills/

With her paper ninjutsu techniques, she was able to overwhelm Obito Uchiha.

Source: https://gamerant.com/naruto-strongest-female-characters/