Second Stark Hyperspace War (Earth-2356)

The Second Stark Hyperspace War was the second of three great interstellar wars involving the majority of the Galactic Republic against its political and commercial enemies. During the war there were known conflicts between the Galactic Republic and the Jedi Order, led by Supreme Chancellor Skor Kalpana and Grand Master Yoda, Sunagar, led by the rogue Master of the Order Bigan, Ame, led by Hanzo of the Guta, Sanghelios, and Mandalore, among many others. The majority of the fighting took place within the Mid Rim, the Outer Rim and its planets, such as Ame, which left them devastated. The war lasted for four years and the outcome went into favour of the Republic.

The Akatsuki leader Nagato referred to it as "a war the Galactic Republic started". The legendary Sannin Jiraiya, Tsunade, and Orochimaru, were veterans of the Second Stark Hyperspace War.

Background
The First Stark Hyperspace War ended with an armistice treaty, but also left the Core Worlds and the Inner Rim seriously wounded. The treaty led to a period of peace, but after twenty years, the economic disparity between sectors and systems had become a serious problem. The Galactic Republic began using the Jedi Order and its Judicial Forces to gain more influence, and under the pretext of expending democracy, worlds opposing the Republic expansionism started using military force to expand their territories. Thus, a second hyperspace war started.

Source

 * https://naruto.fandom.com/wiki/Second_Shinobi_World_War