The fifteenth year of astronomy, that is, 1546 A.D.!

The Tsukawa family completed the basic unification of Dewa Province and dominated the Mutsu region of Mutsu Province and half of the Rikuchu region.

The only thing left in the country is now the Daihoji family in the Shonai area, so it hasn't had time to clean it up because it belongs to Echigo's guardian Uesugi Dingshi, but it's just an excuse to send troops.

The Mutsu Kingdom includes the Mutsu area, the Naka area, the Rikuzen area, the Iwaki area, and the Iwashiro area (including the Aizu area), which was originally a later refinement, but the Michinoku country is too big, so Kira still thinks it is more convenient to subdivide it.

The Ryuchu region consists of the sub-counties of Kato-gun, Iwate-gun, Su-i-gun, Kunohe-gun, Shiba-gun, Barnyard Kan-gun, Waga-gun, Garizawa-gun, Ethorn-gun, and Iwai-gun, among which the three counties of Girzawa, Ekoshi, and Iwai are the traditional spheres of influence of the Kasai clan. However, these three prefectures are not all direct leaders of the Kasai clan, and most of them are people who belong to the Kasai family.

Among them, Ezashi-gun was the territory of the Ethorn family, which was a division of the Kasai clan, Galesawa-gun was the sphere of influence of the Kashiwayama family, and Iwai-gun, which was further south, was occupied by the direct leaders of the Kasai clan and some of the people who were subordinate to Kasai, such as the Ohara family, the Kanazawa family, the Hakuro family, and the Iwabuchi family.

The Rikumae area, which is adjacent to Ryochu and separated from Idewa Mountain, is a three-legged triumvirate of Date, Kasai, and Osaki. Of course, the strength of the Date family is naturally much stronger than the likes of Kasai Osaki when you count the territories of Dehanaki-gun, Iwashiro, and Iwaki regions, but in terms of the Rikuchu region, the strength of the three families is about the same (only the Rikuchu region).

The Kasai clan and the Osaki clan were both from famous families, and in the fifth year of Bunji (1189 AD), Minamoto Yoritomo defeated the Oshu Fujiwara clan. Kasai Kiyoshige of Kasai Imperial Kitchen Castle in the lower head country made a great contribution to the Battle of Oshu and was rewarded by the five counties of Oshu (Grosawa, Iwai, Ethorn, Kesen, and Oshika, and Huanghai and Koda Niho), so the Kasai clan took root in Mutsu Province.

The Kasai clan and the Osaki clan actually belong to two difficult brothers who share the same disease in a sense! The strength of the two families is almost the same, but the two families often break out into joint battles, which can be said to be in love and killing each other.

And the struggle between the two families also caused instability within the two families, so that the Oshu Detective Osaki clan and the famous Kasai clan both went into decline.

In the sixth year of Kansho (1465 AD), the Osaki clan had a conflict with the Tomizawa clan of the Kasai clan, and the two sides immediately fought. The Tomizawa clan is not a soft persimmon, and when he was beaten, he hurriedly found his parent Kasai clan to administer justice. Immediately, a fierce battle broke out between Kasai Osaki.

The battle was very anxious for a while, and in the end the two sides were evenly divided, so they began to "penetrate into the enemy's interior" and divide the enemy from within. Many of the Osaki clan's retainers then turned to Kasai, and many of the Kasai clan's retainers also secretly took refuge in the Osaki family.

The two sides were about to divide up, but many of the retainers of the Osaki family took the lead and couldn't help but launch a rebellion, and the head of the Osaki family, Yoshikane Osaki, was confused by the sudden rebellion, and fled all the way to Liangchuan Castle, the original base of the Date family at that time, and asked Date Minoru for help.

Seeing the rebellion of the Osaki family, the Kasai family was naturally overjoyed, and was about to step forward to pick up a bargain, but they didn't expect that the Date and Ashina coalition army would instantly teach the Kasai family to be a man. Date Ashina's coalition beat the Kasai family to the point of crying dad and mother, and deeply realized what a big guy is.

Since then, the two CPs, Osaki and Kasai, have become the younger brothers of the Date family, although only in name.

The two families hibernate for a long time, until the Date family became active again when civil strife broke out. In addition to Osaki, Kasai, and Date, there were two more powerful people in the Rikuchu region at that time, namely the Kunita clan and the Rushu clan.

The relationship between the Kunita clan and the left-behind clan is also a pair of CPs, and the relationship is even worse than that between Kasai Osaki, which can be described as a feud.

At first, the left-behind clan was attributed to the Oshu Detective Osaki clan.,Although it may be a little brother who is not very obedient.,But nominally it is.。 At that time, the left-behind clan was at a disadvantage in the confrontation with the Kunita family, so he hoped to defeat the Kunita family with the help of the Osaki family, so he welcomed the Osaki family Osaki Naoma as an adopted son.

However, the bad thing is that Naokane Osaki did not mean to help the left-behind family attack the Kunita clan. After all, for the Osaki family, everyone is the "subordinate" of my Osaki family, and it is better for everyone to be harmonious and make money, so why shout and kill?

At that time, the Osaki family was in a slightly better situation than the current Osaki Yoshinao, at least the forces near and far in the Ou region had to give a little bit of thin face, but this did not mean that the Osaki family could control the situation. Therefore, Osaki Yoshinao's "inaction" led to collective dissatisfaction among the retainers of the left-behind clan! MMP invited you to help us score the national score, but if you don't do it, then you have an egg! Therefore, the angry retainers exiled Osaki Yoshikane, and then the left-behind family turned to the Date clan.

Later, a succession battle broke out within the Left-behind clan, and the Left-behind Housekeeper and the Left-behind Saburo Jiro began to compete for the position of the governor of the left-behind family with the backing of the Date clan and the Osaki clan respectively.

After three years of struggle, the left-behind family finally won the victory, which also made the left-behind family and other Lu Chinese see the strength gap between the Osaki family and the Date family, so the left-behind and other countrymen threw themselves into the arms of the Date family, well, this time it was a sincere surrender.

In order to stabilize the hard-won "fate" with the Date family, the housekeeper stayed behind and accepted Date Gumune, the son of Date Mochimune, as an adopted son, and inherited the position of the lord. However, due to the early death of the son of the left-behind (Date) gunmune, the left-behind gunzong accepted Date Keizune's younger brother Date Keizune as his adopted son and became the head of the left-behind clan. At this point, the left-behind clan has become the hardcore little brother of the Date family.

As for the history of the Kokubun clan, like the Kasai clan and the Rushu clan, the first Kokubun Yintsu was given the territory of Kokubunji Township for his exploits in the Oshu War, and settled down in Kokubunji to become the Oshu Kokubun clan. The Kokubun clan maintained its rule through marriages with the surrounding Tendo, Akiho, Kamida, and Watari clans, and was more active, and the Kokubun clan was more independent than the left-behind clan, but it was useless in the Ou region, which was surrounded by strong enemies.

As for the grievances between the national division and the left-behind families, it is necessary to appeal to the Kano period (around 1351 AD), when there was chaos in the Oshu area. Ashikaga Naoyoshi and his brother Ashikaga Takashi were opposed, and the forces in the Oshu region began to take sides, with the Kira family on the side of Ashikaga Naoyoshi and the Hatakeyama family on the side of the Ashikaga clan.

The Kira clan and the Hatakeyama clan fought under Iwakiri Castle, the base of the Stay-behind clan, and the Yakusuri clan joined the side of the Hatakeyama clan, and the Kunita clan also sided with the Kira clan. Later, the Hatakeyama clan was defeated and committed suicide, and a large area of the remaining clan was invaded by the Kunita clan.

This has become the reason for the constant dispute between the two families.

Originally, whether it was Kasai, Osaki, or Stay-at-Us, and Kunita, almost all of them had been educated by Date Minoru, and they could be regarded as forces attached to the Date family. However, as soon as the civil strife broke out in Date House, the dispute between Osaki Yoshinao and Osaki Yoshinobu, and the chaos caused by Kunita's support for Date Minoru staying behind and supporting Date Harumune, and Kasai's fishing in troubled waters, it seems that the situation in the Rikuzen region has cast a shadow on the situation in the Rikuzen region.