The Northern Front was a valley, The Hyuga and Aburame were positioned to hold the elevated ground, using their vision and senses to control the battlefield. Their formations and traps were precise, silent and like a spiderweb that stretched across the valley.
The Sarutobi and Shimura, in contrast, had lower ground and forests, spreading out with stealth and smoke. Their style was old-school flame and misdirection.
An elite unit, combined of Shimura and Sarutobi moved in the valley taking cover. Just when they wanted to climb up, sudden volley of chakra beetles burst from the trees, they attacked the Shimura and Sarutobi clans' ninjas.
Before they could respond, Byakugan activated Hyuga ninjas dropped in from above. Silent, white-eyed ghosts...
"Gentle Fist: Eight Trigrams Air Palm!"
The blast sent a few Shimura ninjas tumbling off. Shimura and Sarutobi ninjas were getting ready to perform wind and fire combo. Just as they were about to move, they felt something moving below them.
A huge white snake drilled out from the ground and opened its mouth to release poisonous gas. Some ninjas who were not fast to react, were easily poisoned by this gas.
Sarutobi Jonin: "You're not pure Hyuga, are you?"
"Fire Release: Crimson Petal Flare!" Multiple small fireballs rushed in from all angles, each one with a hidden kunai core.
Kozan didn't move and let the attacks hit him, but no damage was caused. His strong snake scales were like steel and detected most of the physical attacks.
Huyga Kozan: "Is this all you got?" with that said, he vanished and came behind SarutobiJonin, and with one bite the Sarutobi Jonin was no more.
After seeing this Shimura and Sarutobi unit decided to fallback for now.
Hyuga–Aburame Command Center
Shiho: "Is it ok to just defended and not attack"
Tennin: "Clan Leader Shiho, this battle is between Senju and Uchiha. Our only task is to defended north side. as long as we don't let the Shimura and Sarutobi clan pass everything is fine "
Shiho: "Hmmm... " did not reply and was in deep thought....
Tennin: "Shimura and Sarutobi are not fools, they will never go all out."
Shiho: " Ok! this plan should do for now."
Shimura-Sarutobi Command Center
Shimura Daien: "Sarutobi, why not attack? Our clans can easily take them down."
Sarutobi Masaki: "Lets just strike and defend for now."
Shimura Daien: "Sarutobi, you are weak. Please listen to my suggestion"
Sarutobi Masaki: "That's enough, I am the commander of north alliance unit"
Shimura Daien: "Sarutobi, you will regret this!"
After everyone left the command center, Sarutobi Masaki was sitting alone thinking. He started writing a letter and soon he called for Sarutobi clan ninja, "Deliver this letter to Hyuga Tennin, but make sure no one notices you."
Northern Valley - Night
Sarutobi Masaki: "Lord Tennin, thank you for accepting my request for a meeting."
Tennin: "Time is a resource. Why have you called me here?"
Sarutobi Masaki: "During today's battle, what my comrades described me was that they met a Hyuga who transformed into a giant serpent."
Tennin: "Huyga Kozan! What you saw was his 2nd bloodline limit. Say it plainly, Masaki."
Sarutobi Masaki: "Was this some new invention done by Uchiha Leo?"
Tennin thought for a while and told Sarutobi about the devil fruit. He wanted to see how the Sarutobi clan leader will play next. Sarutobi Masaki was thinking about his clan's future.
Sarutobi Masaki: After thinking for few seconds, "If we join Uchiha, can we get the same benefit?"
Tennin: Not at all shocked, he had expected this "I will pass on your request, final call is up to the Uchiha clan."
Sarutobi Masaki: "Will wait for the good news..."