Madara Uchiha (うちはマダラ, Uchiha Madara) was a legendary leader of the Uchiha clan. He founded Konohagakure alongside his rival, Hashirama Senju, with the intention of beginning an era of peace. When the two couldn't agree on how to achieve that peace, they fought for control of the village, a conflict that ended in Madara's death. He rewrote his death and went into hiding to work on his plans. Unable to complete it in his natural life, he entrusted his knowledge and plans to Obito Uchiha shortly before his actual death. Years later, Madara would be revived, only to see his plans foiled before dying one last time.
A God Tree seed landed on Earth from a meteorite several millennia ago in the anime, which grew by absorbing the blood soaked into the ground from countless battles. In the anime, it was believed that the God Tree nourished the land and helped it thrive, while in truth, as revealed by Gamamaru, the God Tree was slowly killing the land and its people, by draining natural energy from them. Due to its massive size and the conditions under which it is grown, the God Tree is revered by some cultures; humans used to worship the God Tree of Earth as a sacred pillar that extended into the heavens and remained ambivalent to all conflict. In the anime, it was known that anyone who approached the tree was consumed by a demon spirit and died like a withered branch.
As a measure to keep the peace, Kaguya enslaved part of the human population with the Infinite Tsukuyomi and bound those affected to the God Tree, assimilating them with its life force and gradually turning them into White Zetsu. When Kaguya's sons, Hagoromo and Hamura, were born with chakra of their own, she merged with the Earth's God Tree in order to take the chakra back, thus becoming a monster called the Ten-Tails. If all of the chakra in the world is united with the God Tree once more, it would be able to bear a new chakra fruit.
A clan (一族, Ichizoku, Literally meaning: household, clan), in the loosest sense of the term, refers to a family or group of shinobi who form a basic unit of a shinobi village. A majority of these clans were mercenary military forces even before the First Shinobi World War.[1] The Senju clan and Uchiha clan were the first known clans to have agreed to settle and form a shinobi village, facilitated by creating agreements with the daimyō of the land they inhabit. Many clans would follow the example of the Senju and the Uchiha, later establishing the Five Great Shinobi Countries as they are known today. Membership in a clan is usually determined by blood relations and genetics, which is vital in the usage of kekkei genkai and secret techniques. These attributes and abilities made many clans feared and renowned throughout many villages. While clans may be composed of many individuals and extended families, many clans mentioned and seen in the series were somewhat limited to a nuclear family.
