Grand and Belluterra:5798 BC: Mount Mere erupts, destroying the indigenous prehistoric civilization on the island of Shebanin (the ancient name for Grand). Few artifacts survive prior to this time.
c. 4500 BC: The Rogue (pronounced ro-keh) civilization, hailing from modern-day Puget (idk what the NPC nation there is now called), recolonizes the island.
c. 4000 BC: The Vassals, originating from the Vassal Archipelago to the north, also start to move in.
3265 BC: Prince Haskan of Shebanin orders all Rogues to leave the island.
3266 BC: Beginning of the Rogue Wars.
2886 BC: The Rogue Empire, now the most extensive civilization in the region, stages a massive invasion of Shebanin with 35,000 men
2890 BC: Shebanin falls, ending the Old Principality era; The island is made the new capital of the Rogue Empire
2156 BC: Five Vassal nations invade Shebanin and capture it; effective end of the Rogue Empire, which is severely weakened
2155 BC: Shebanin partitioned among the invading Vassal states; small portion delegated to Shebanite survivors
c. 2100 BC: Rogue Empire finally collapses
2055 BC: Shebanin re-united; New Principality era begins
1444 AD: Trentannian exploration vessels arrive; island first nicknamed "Grand"
1446: Trentannians open up trade with Shebanin
1451: King Mark I of Trentannia orders that all trade between Shebanin and other nations must first pay tolls to Trentannian warships "guarding" the major harbors
1453: Trentannia builds first military fortress in Shebanin; official protests largely ignored
1460: Trentannia forces Shebanin to stop trading with other nations
1469: Trentannia attempts to annex Shebanin; start of the Trentannian-Shebanite War
1492: End of Trentannian-Shebanite War
1494: Death of Prince Thun VII; collapse of the millennia-old Principality of Shebanin
1579: Admiral Jaqcues Thomas of Posillipo "rediscovers" Grand
1581: A small Insulonian fleet lands on the island; founds a small colony
1582: Grandian Colonist War occurs; Posilliponian Grand gains special status in the First Posilliponian Empire
1607: Independent Insulonian presence on Grand comes to a close as the colony is annexed to Posilliponian Grand
More coming soon
Trentannia1444-1445 AD: Explorer Albert Green makes oldest surviving map of the Sushilli Sea; "discovers" Shebanin, and returns claiming it to be a fabulously wealthy land filled with many resources
1469: Trentannia declares war on Shebanin
1492: Trentannia loses control of its Sushilli territories, paving the way for Posilliponian and Insulonian dominance in the Vassal Archipelago
Posillipolate 1570s: Admiral Jaqcues Thomas, notable Posilliponian explorer, sets out to circumnavigate Adonia
I also think that Neridea and Carreon should be two seperate categories