The Siege of Italica was a battle fought between the ex-soldier bandits that had raided the town of Italica and the Special Task Force. It ended with the Special Task Force's victory through the use of helicopter gunships and air cavalry forces. Italica later becomes one of the few areas in the Special Region that is under Japanese influence.
Ever since the death of the former head, along with how Italica's military force had weakened due to losing soldiers that were used by the Empire for the expedition in Japan, bandits had been attacking the village, threatening to loot the town and rape the women. Piña Co Lada, believing that Italica was being attacked by the otherworlders, came to help only to find out that scattered remnants of the defeated Army of United Kingdoms had defected and turned into marauders; this becomes ironic later as the 3rd Recon Unit came by for business purposes where Piña had, despite in how they are enemies, asked the JSDF for help due to how she found herself overwhelmed by the constant attacks of the bandits.
Piña planned to take advantage of the 3rd Recon Unit by placing them alone at the South Gate as the Imperial princess had believed the bandits would strike there first. Piña and her troops were stationed at the East Gate. Civilians were protected by barricades so that even if the enemy broke through the gates, civilians would have a final line of defense to ensure successful evacuation. However, Piña's predictions were wrong as the bandits attacked the East Gate and she didn't call the JSDF for backup since she was largely unaware of their superior weaponry and thought they were too busy fighting for their life in the South Gate. Without the support of the JSDF , the bandits advance their attacks. Following the death of Norma, the bandits breached the wall and began attacking civilians who wanted to fight for their freedom.
Around this time, Rory started feeling the deaths of the many soldiers, triggering an insatiable bloodlust. This drove Rory to charge onto to the battlefield and engage the enemy, causing severe casualties with her superhuman strength and abilities. Rory is followed into the battle by Sgt. Shino Kuribayashi, who fights alongside Rory, causing further casualties among the invading bandits. Around the same time, 4th Combat Unit also arrived in helicopters and practically wiped out the bandits with their overwhelmingly superior firepower. The few survivors were captured by the JSDF, some of whom were sent to Alnus to work as laborers under the close watch of the JSDF.
Because of the JSDF's outstanding contribution with no request of payment, a treaty between the Empire and the JSDF was established. However, some soldiers not involved in the siege were unaware of this, leading to the capture and assault of Itami who had been mistaken for an enemy. This led to Piña personally apologizing for the incident. Several prisoners from the battle, including Myuute Luna Sires, were sent to Alnus where they were allowed to work in the town that had been established around the refugee camp under the close watch of JSDF military police and their local auxiliaries. Myuute eventually ended up joining the auxiliaries herself, working under fellow auxiliary MP Rory Mercury.