In Full Bloom Yon Jae Won manga

Cestus, a young slave, fighting for is freedom as a bare knuckle gladiator studing under a legendary gladiator who faught and drawed with the head of the imperial gaurds in the roman era.

NOTE: Not to be confused with Peacemaker Kurogane

Tells of a lone gunman named Hope Emerson, the son of legendary gunfighter Peace Emerson. Known for the Spot Burst Shot, a technique that involves the firing of multiple bullets at a rapid pace while fanning the revolver s hammer.

Emerson gets drawn into a mysterious conflict when he defeats a gunslinger named Hans -Grim Reaper- Giles in a duel after surviving a gunshot due to his bulletproof jacket. Hans had been part of a private mercenary force known as the Crimson Executioners, raised by millionaire Phillip Crimson.

Tale of a lone gunman named Hope Emerson, the son of legendary gunfighter Peace Emerson. Known for the Spot Burst Shot, a technique that involves the firing of multiple bullets at a rapid pace while fanning the revolver's hammer.

Emerson gets drawn into a mysterious conflict when he defeats a gunslinger named Hans "Grim Reaper" Giles in a duel after surviving a gunshot due to his bulletproof jacket. Hans had been part of a private mercenary force known as the Crimson Executioners, raised by millionaire Phillip Crimson.

Anuki is a boy caught in a war between two countries. When he is small he is abandoned by his father so a princess could be saved. This event triggered amnesia so he doesn't remember his childhood before this event.When he grows up he joins a flight mercenary unit to be trained as a pilot so he can help in the war, there he becomes the ace pilot.

Thorfinn is son to one of the Viking's greatest warriors, but when his father is killed in battle by the mercenary leader Askeladd, he swears his intent to have revenge. Thorfinn joins Askeladd's group in order to challenge him to a duel, and ends up caught in the middle of a war for the crown of England.

From Wikipedia:
Pilgrim Jäger is a historical fiction that takes place in Europe in the year 1521, at the time of the Protestant Reformation. The story follows two women, Adele the acrobat and Karin the fortuneteller. Afraid of being accused of witchcra

From: Easy Going Scans

The country of Greenland, after losing the war to the Imperial Army, were in agony and despair for what will the future bring them. They had hired mercenaries to help them during the war and now they?ve come back to collect their reward while the country were still picking up their pieces of their broken dreams. By that time, the King has passed away and his heir was still too young to take up on the throne. After hearing the news of the King?s death the mercenaries decided to take over the throne and rule in his place. But there was an obstacle in their way... The Oracle!

The end of the Edo period, the Bakumatsu (between 1853 and 1867), was an era of uncertainty and chaos, a time when the line between right and wrong was indistinguishable. During this era, Hijikata Toushizou, determined to live by his own rules, led his re

Jushin, which is modelled after feudal Korea. In Jushin, there once lived secret government agents called angyo onshi, who traveled the countryside in disguise. They were charged by the king to find and punish corrupt government officials, and bring justice to the country's citizens. Jushin has been destroyed, fractured into numerous fiefdoms and kingdoms, many of which are ruled by corrupt and tyrannical warlords. Shin Angyo Onshi follows the adventures of one of the remaining angyo onshi, Munsu, as he continues to wander the countryside and deals with the chaos caused by Jushin's fall. ong ago, in Jushin, special secret agents named "Angyo Onshi" wandered the country and restored the order. But now that Jushin is destroyed, only one is still wandering...