Transmigrating into One Piece: Starting as a Slave

[Founding a nation, vying for supremacy, multiple women, Warhammer elements, kingdom-building.]

The Red Line.

Taking advantage of Fisher Tiger's rampage through Mary Geoise, Zhao Wuyan fled with the young Boa Hancock. One went to the West Blue, the other returned to Amazon Lily, and they agreed to meet again at the top.

A year later, on a small island in the West Blue, Zhao Wuyan had brought the whole place under his rule, turning it into a prosperous and happy island.

Alas, just as the good times began, the Celestial Dragons' lackeys caught their scent and came after them.

With no other choice, Zhao Wuyan once again set out on the path to strength and formed an alliance through marriage with the Vinsmoke family.

With the power of the System, he created a scaled-down version of the Space Marines.

When Zhao Wuyan arrived at the Summit War with a tide of ghouls, an army of ghost soldiers, and a Mechanical Dragon King beneath him, he realized he had already become a power to be reckoned with.