Eight-Nation Revolution

The Eight-Nation Revolution is a combination of world wide rebellion efforts taking place in multiple countries as consequence of the Revolutionary Army's invasion of Mary Geoise during the Levely.

The Eight-Nation Revolution was first mentioned by Tensei, head of the Marines' Investigation Unit, sometime after the events of the Raid on Onigashima.

Background
The reasons for the revolutions are not confirmed. In the Lulusia Kingdom, it originated shortly before the Levely. Once the royal family of King Seki and Princess Komane, along with the Royal Guards, sailed for Mary Geoise, the country was left defenseless against Peachbeard. The citizens were saved by four of the commanders of the Revolutionary Army, and Belo Betty prompted the citizens to fight for themselves.

Overview
Following the invasion of Mary Geoise by the Revolutionaries and subsequent murder of Nefertari Cobra, with Sabo being labeled as the perpetrator, the populations of eight nations around the world decided to take up arms and start local revolutionary efforts of their own to depose their monarchies, having been inspired by Sabo's actions in particular as they were reported in the news. As consequence of this, eight nations affiliated with the World Government ended up falling to rebel armies, who took advantage of the ongoing Levely at the time to establish new governments while their rulers were absent.

Among the countries that successfully deposed their monarchies was the Lulusia Kingdom. Its constituents imprisoned Seki and Komane following their return from the Levely.

Aftermath
After Lulusia was liberated from its monarchy, Im and the Five Elders completely obliterated it from both the map and history, thus rendering the revolution of the country moot. The reason for doing so was because at the same time, Sabo was seemingly hiding on the island and attempting to transmit the information that Im sat upon the Empty Throne. Their plan ultimately failed as it turns out, Sabo was already leaving Lulusia with a handful of people from the kingdom who wanted to join the Revolutionary Army. As such, though the kingdom was destroyed, the people who originated from it survived and could rebuild.

Trivia

 * During a rally shown in Chapter 1054, flags of the Revolutionary Army and Sabo's jolly roger were shown, as well as a flag with an upside down Marines symbol and a flag with the World Government symbol with an arrow through it.