The info here has been collected from all over the place (mainly the new Zoids graphics and the timeline on Zoids Generations) and smushed all together.

Will be padded out more as time goes on.

Era	ZAC Calendar		Event
	12 billion years ago		Birth of the universe.
	5 billion years ago		Birth of Planet Zi.
Palaeozoic Era	4.8 billion years ago		Birth of thermophilic life.
	3 billion – 500 million years ago		Primeval metal life forms flourished in the high temperature seas.
Mesozoic Era	200 million years ago		Appearance of Zoid Cores.
	200 – 50 million years ago		Golden age of the dinosaur Zoids.
	50 – 30 million years ago		Planet Zi’s ice age. Dinosaur Zoids became extinct.
Cenozoic Era	30 million years ago		Rise of animal-type Zoids.
	700,000 years ago		Climate changes on the planet. Diversification of animal Zoids.
	100,000 years ago		Ancient Zoidians appeared.
Stone Age	10,000 years ago		Zoids were domesticated by the ancient Zoidians.
Megalithic Civilisation Period	ZAC 0001		Beginning of the cultural livelihood of Zoidians. Artificial breeding of Zoids began.
Era of Natural Disasters	pre ZAC 1600		About 50 tribes were scattered across the central continent. They were isolated from each other by the frequent natural disasters.
	ZAC 1600		The natural disasters end. Only small-scale volcanic activity continued.
Era of Tribal Disputes	ZAC 1693		Discovery of the Babahott Iron Plate. Traces of the shell of a huge god were located.
	ZAC 1700s		The 50 small tribes merged into 8 larger tribes.
			End of the volcanic activity. The populations of Zoidians and animals began to increase.
	ZAC 1850s		The tribes cooperate and aimed to increase food production. A cooperative system was born. However disputes between tribes also began to occur.
			The balance of the ecosystem collapsed due to the arificial selection of wild Zoids.
	ZAC 1900 ~		Battle Zoids were born. The earth tribe began remodelling Zoids.
			The disuputes between tribes intensified and became an everyday occurance. The economic disparity between the continent’s east and west sides was obvious — the situation was as thought the people in the west envied the eastern tribes.
Feudal War Era	ZAC 1920		The continent was split into two great powers — a federation lead by Guylos, who rallied the tribes in the west, and the peace forces allied by Helic Muroa in the east.
	ZAC 1930s		The growth of Zoid manufacturing. The simple cockpit was expanded.
	ZAC 1950s		Zoid manufacturing technology spread between the tribes.
	ZAC 1955		The feudal war intensified.
			Helic left the central continent in a bird Zoid. The peace forces stod up against a shadow warrior and stuck the battle out until the end.
	ZAC 1957		The shadow warrior was a mysterious army invading from the dark continent (later identified as being the dark continent army). Helic returned and pursuaded Guylos to help him repel the army.
Unification on the Central Continent		July 25	The feudal war ended and the central continent was unified under the new Helic Republic. Helic became king and imposed a system of government. Peaceful times arrived.
			Guylos leaves for the dark continent where he later founded the Guylos Empire.
			King Helic’s first son was born. His mother was from the wind tribe, like King Helic.
	ZAC 1959		Zenebas was Born. His mother, King Helic’s second wife, was the younger sister of Guylos, from the earth tribe.
			The mass production of Zoids began (by the Zoid administration bureau). They mass produced the Mechabonica.
	ZAC 1960		The discovery of dinosaur Zoids.
			The republic developed its first Zoids.
Era of War on the Central Continent	ZAC 1975		The death of King Helic.
	ZAC 1976		Split of the Helic Republic.
	ZAC 1978		Helic II abolished the monarchal system and became the first president. Zenebas was inaugurated as the highest commanding officer.
			Zenebas was banished from the republic. He lead the Guylos-supporters over the central mountain range and founded the Zenebas Empire on the west side of the continent.
			The Helic Republic and Zenebas Empire broke into war.
	ZAC 1980		The battle of Red River. The imperial army finally invaded republic territory. Both armies clashed at Red River. The battle continued for 4 months, and ended with the retreat of the imperial soliders.
	ZAC 2018		Battle of the desert. The republic sensed an incoming invasion from the empire and invaded imperial territory first. In order to avoid a battle at the capital the empire intercepted them in the desert. The desert was dyed with blood and the battle became a longterm battle.
	ZAC 2029		First contact with Earthlings. There was an uprising on the human pioneer ship Globally III and it crash landed at Grandbaros mountain range. The crew was separated between both armies and they became prisoners of war. This incident marked the end of the battle of the desert and the withdrawl of both armies. Earth technology was introduced to the Zoidians.
	ZAC 2030		Both armies rapidly augmented weapons with the earth technology they had been given. New weapons like the beam cannon and missiles were equipped to Zoids. The war immediately switched to a violent modern battle.
			The republic’s Zoid Gojulas and imperial Red Horn were developed.
	ZAC 2031		Birth of the imperial Zoids army.
			Unprecedented Zoid development race. Zoids were completely changed as both armies put all their energy into an initiative to develop all new Zoids. From this the battlefield was not only on land, but expanded to sea and air battles as well.
	ZAC 2032	October	Battle of Aldannu. Planet Zi’s first battle with modern Zoids. The power of the Gojulas resulted in the republic army’s victory. This battle differed from the previous ones — it was the beginning of an era of severe, gruesome battles.
			Imperial civil war
			Iron Kong rollout. The development of the imperial army’s first huge Zoid, the Iron Kong, was a success. 150 machines invaded republic territory and clashed with the 200 Gojulas. The confrontation ended with the imperial army’s withdrawl, but the damage done to the Gojulas exceeded that of the Iron Kongs. This was the end of the Zoid Gojulas’ unrivalled era.
	ZAC 2033		X-Day proclamation.
			Orders to strengthen the Gojulas. Shocked by the power of the Iron Kong, the republic army ordered 9 of its development labs to develop a strengthened Gojulas. The results were a Gojulas equipped with long-distance cannons, the Gojulas Mk II.
			Kamikaze Joe’s great efforts.
	ZAC 2034		Second Zoids development race. The development of new Zoids was accelerated more and more and, one by one, Zoids like the Saicurtis and Snakes were developed.
	ZAC 2035		Gojulas’ secret directive. The republic army, upon receiving information about the development of a new imperial Zoid, sent a solo reconnaissance Gojulas to the empire’s special factory. The strategy was a success and the empire’s new tiger-type high-speed Zoid was revealed.
	ZAC 2036		Sabre Tiger rollout. The empire’s historical first high-speed large Zoid, Sabre Tiger, entered combat. This red flash of lightning covered long distances to harass the republic army.
			Battle of Blood Rock.
	ZAC 2037		The republic completed its unprecedented gigantic decisive battle Zoid, the Ultrasaurus. The terrified imperial army sent out their remarkable spy command Echo and stole the Ultrasaurus.
			The republic army succeeded in recovering the Ultrasaurus with the strategy proposed by First Lieutenant Roy S Thomas.
			Battle of the large ice field. Echo’s Iron Kong Mk II lured the Ultrasaurus into the central continent’s northern-most ice field and tried to crush it, but First Lieutenant Thomas’ Gojulas Mk II intercepted. The battle of the Mk IIs ended with the Kong’s defeat.
	ZAC 2038		Ultrasaurus escape strategy. The imperial army began their assault. An imperial elite force surrounded a republic radio base near Burnam River and the personal of the base attempted to escape in the Ultrasaurus. With an every-direction attack the tables were turned and the escape succeeded.
			Ultrasaurus landing operations. Five elite republic units brought the empire’s advance at Red River’s west bank to a standstill and the war was deadlocked. The republic army drafted a strategy that landed the Ultrasaurus unit at the west side of Miebaros Bay on imperial territory so it could directly attack the imperial frontline command HQ. The operation was a success and the imperial army took serious damage.
	ZAC 2039		Fall of the Zenebas Empire capital city. The republic army encircled the imperial capital. The bombardment and raids extended for many days at the marble capital on Mt Gareki, named White Town. With Ultrasaurus at the centre, the republic battalion broke into the capital. Emperor Zenebas escaped to Valesia Bay, on the north coast of the continent.
			Emperor Zenebas fled to the dark continent in a Storch. With Colonel Johan Erikson’s Ultrasaurus at the centre the republic army attacked the imperial Valesia Bay. Using General Danny (Tiger) Duncan as a sacrifice, Emperor Zenebas fled to the dark continent Nyx.
			The republic discovered a wild Shield Liger.
	ZAC 2041		Zenebas’ counterattack. The Zenebas Empire received support from the Guylos Empire on the dark continent and left Valesia Ocean. Returning to the central continent with the power of new Zoids, Zenebas crushed the republic army and reclaimed his old territory. The battle hereafter was called the second central continent war.
	ZAC 2042		Struggle of the border bridge. Emperor Zenebas announced the “republic advance strategy”. They executed a surprise attack with Cardinal, custom Iguan airborne troops lead by Lieutenant Colonel Frost, in order to secure the Almerhen bridge, a bridge the crossed the Burnam River that flowed along the border. The strategy was a success and the bridge fell into the hands of the imperial army.
			Birth of the Shield Liger. The battlefield spread to the republic woodlands that crossed over the central mountain range. Colonel Erikson deployed the republic’s first high-speed Zoid, Shield Liger. The personal high-speed manoeuvre unit supported the front.
	ZAC 2043		Shield Liger surprise attack strategy. The Blue Pirates (the republic’s micro-type Zoid command force) discovered parts of a new large Zoid in an imperial army truck they had attacked. The republic army, full of fear, had the high-speed manouevre unit lead by Colonel Erikson wage a kamikaze attack at a research lab inside imperial territory. However the imperial army blew up the lab and the strategy failed.
	ZAC 2044		Death Saurer rollout. The empire finally completed its strongest Zoid, the Death Saurer, developed to stand up against the Ultrasaurus. At once the military balance slanted toward the imperial side. The Death Saurer completely crushed all Gojulas, Gojulas Mk II and Shield Liger units in its way and advanced with its sights set on the republic capital city.
			Ultrasaurus Vs Death Saurer. Approaching the republic capital, Second Lieutenant Toby Duncan’s Death Saurer was ambushed by Colonel Erikson’s Ultrasaurus. The battle ended with the Death Saurer’s victory and Colonel Erikson’s death. Second Lieutenant Duncan’s spirit was also deeply wounded.
			Fall of the republic capital city. The imperial army broke into the the republic capital. However President Helic took decisive tunnel operation actions and both people and soliders had already escaped. The empire’s plan was in vain. A custom Shield Liger destroyed the tunnel and blocked the pursuit of the Death Saurer.
		December	The republic army’s counterattack began. With their whereabouts concealed after the fall of the capital, the republic army used custom Gorhecks to kamikaze attack the republican northern Cook Naval Base that was under imperial occupation. The imperial northern fleet of Sea Panther and Wardick were annihiliated. The pursuing impierla units were destroyed by the “Ultrasaurus substitution operation” that used two presidential Ultrasauruses.
	ZAC 2045		The activity of the substitue President Helic rose morale between the people of the republic army while struggling against the Death Saurer. Guerrilla warfare developed all across the continent. The republic navy ensured a marine transport route around the republic territory costal area as well as around the islands on the outskirts, and units passed through the seas freely.
		March	Failure of the Death Saurer capture strategy. Generals of the republic army enacted Death Saurer capture operations by attacking together in Ultrasauruses and Salamanders but the strategy was too ill-prepared and it ended in failure when cooperation didn’t go smoothly.
		May	Battle of Florecio Ocean. President Helic planned to move to the main central mountain range. They executed tactics that would make a clean sweep of the imperial navy located in Florecio Ocean in the south. The imperial army, caught by a small unmanned decoy Zoid, was annihilated by the aircraft Ultrasaurus and Pteras fleets spearheaded by Admiral Linderman. The reinforcement Reddra units were also damaged by the Pteras. The republic army acquired control of the whole Florecio Ocean.
		June	President Helic abduction tactics. Captain Franz Haltman of the imperial army ued the Death Saurer as bait and infiltrated a secreate base on a small island in Florecio Ocean where Helic lived underground. Captain Haltman tried to abduct the president but was stopped by the presidential bodyguards (the republic’s new 24 Zoids). The abduction tactics were a failure.
		July	The republic began movement to the central mountain range. The republic army implemented a strategy to land them at Gerumaji Peninsula on the southern tip of the central continent. Before this they carried out the Ultrasaurus diversion strategy to lure out the single Death Saurer stationed there. A diversionary force with an Ultrasaurus at the centre advanced to Diepp, the shore opposite Gerumaji. The force caused devastation and the diversionary tactics were a success. The Death Saurer also fought determinedly but was finally crushed by the main landing unit, and the republic army captured Gerumanji Peninsula.