Battle of ginza

The Battle of Ginza is an opening battle of the Gate series. This battle features a unknown portal nicknamed the Gate from another world appears in Ginza, Tokyo, where it suddenly unleashed a legion of soldiers and monsters to attack the city. Whilst the invading enemy was successfully repelled by the military army's modern weaponry and tactics, the incident would also directly led to the JSDF's expedition into the Gate's other world: the Special Region in order to investigate the cause behind the invasion.

Background
(To be added...)

Battle Initiation
A mysterious gate suddenly appears in Ginza, Tokyo where fantasy creatures led by men in Roman armor come out from it and attack the people. Yōji Itami, a JSDF reservist, who was attending a nearby doujin convention, takes action by organizing the police to evacuate the civilians into a palace to protect them before the JSDF arrives to stop the invaders with the civilians safely evacuated in to the palace the JSDF begin to retaliate by using advanced weaponry and tactics, the JSDF easily repels the enemy capturing little more than 6,000 enemies.

Aftermath
The result of the failed invasion has cost lives of countless civilians in Ginza, especially the civilians who were caught in the middle of the legion's attack. As a memoir of this infamous massacre, the aftermath would be dubbed as the Ginza Incident. In response, Japanese Prime Minister had to take action by proclaiming Japan will send a JSDF task force-which mostly backed by the US- to the "Special Region", the world beyond the Gate, to not only explore the new world but also capture and demand reparations from those responsible for the attack. Ironically, JSDF's expedition into the Special Region would also prompting the worlds's local residents to assume them as "invaders".

Trivia
(To be added)