Library

For the Age of Empires tech tree, see here.

As in Rise of Nations, the Library is the nucleus of your scientific research (or what passes for it) in Warbirth.

There are five paths of research in the Civic Centre: Science , Commerce , Administration , and Military , as well as three trunk technologies. Each one of them is a prerequisite for further research, which in turn might contribute towards bettering your units and even the stylistic appearance of your faction's buildings!

Note that the Library's appearance and nomenclature can change depending on the submods. While Age of Chariots and Rise of the Ancients use a Library, Age of Empires relegates its functions to the Civic Centre.

Ages

"[T]hey pass away in the rustling blast, and other leaves lift their green heads on high." —James Scott MacPhearson, Ossian

Ages allow your faction to grow and mature as a civilisation, and are required to access Reforms and Research which enhance your faction vis-à-vis others. Each age is costlier and harder to research than the next, but great are the rewards should you chooise to pursue them.

RESEARCH LEVEL	NAME	GRANTS ACCESS TO	COST
(0)	Copper Age	(Not available. Only for Rise of Ancients. Only Hovels are available at this age.)	None— basic level
1	Bronze Age	"And thy heaven that is over thy head shall be brass." —Deuteronomy (28:32) Basic tech level Axe infantry can be researched. Note that the Arabs can recruit camels off the bat, giving them somewhat of an advantage.	Resource cost: 300 500
2	Heroic Age	"Who is most glorious of the heroes, who is most eminent among men?" —Epic of Gilgamesh Prereq: Up to 10 non-Trunk technologies Low-level technologies and units, including roundships and elite axe and spear infantry, as well as heavy chariots. Horse skirmishers appear.	Resource cost: 600 500
3	Axial Age	"A deep breath bringing the most lucid consciousness." —Karl Jaspers, German theologian Prereq: Heroic Age AND Up to 20 non-Trunk technologies Advanced tech level and units, full roster reached.	Resource cost: 1,300, 900

Scientific research

If you search for the laws of harmony, you will find knowledge. —Egyptian saying

Science research increases line of sight for many of your units (including buildings), makes new Resource technologies available so you can increase gather rate, permits construction of new types of buildings, and decreases the cost of all other technology research incrementally.

RESEARCH LEVEL	NAME	GRANTS ACCESS TO	COST	UNLOCKS
1	Written Word	"All that I have written seems like straw." — Thomas Aquinas, Christian theologian and mystic, to Reginald of Piperno Transport of land units by sea Research cost cheaper and research speed improved by 10% Increased LOS	Resource cost: 120 50
2	Loremastery	All words hold a seed of truth, from their very syllables all the way to the mood of the speaker. Research cost cheaper and research speed improved by 10% Increased LOS		Granary Lumber Mill Literacy
3	Cosmology	"Let us meditate on the effulgent glory of the radiant Sun." —Gayatri Mantra Research cost cheaper and research speed improved by 10%
4	Numeracy	Not everything that counts can be counted. Research cost cheaper and research speed improved by 10% Increased LOS.
5	Formal Education	He who goes unpunished never learns. —Greek proverb Research cost cheaper and research speed improved by 10% Increased LOS		Pedagogics with Heroic Age
6	Deductive Reasoning	"I think; therefore, I am." —Rene Descartes Low-level knowledge upgrades for University Granary Lumber Mill. Research cost cheaper and research speed improved by 10% Increased LOS
7	Logic	Reason has an innate beauty of its own. Foundry Low-level crops and lumber upgrades in Granary and Lumber Mill. Research cost cheaper and research speed improved by 10% Increased LOS	1,500 1,500

Commerce research

 ...where the houses overflow with the greatest troves of treasure... —The Iliad

Commerce research will cost you Timber and Knowledge at the Library. When you complete Commerce research, your [1]goes up for all Resources you gather: Food, Timber, Metal, and Wealth. You can gather more of them only up to the Commerce Cap; surpass the cap and any excess is simply lost to you.

In addition, Commerce is required in order to open up access to Mercenaries. While there are several exceptions, Mercenaries unlock at Lvls 1,3 and 5.

RESEARCH LEVEL	NAME	GRANTS ACCESS TO	COST	UNLOCKS
1	Exploration	To know one's world is to know one's true self. Increased Caravan limit Increased Commerce Cap for all resources	60 60	;
2	Commodity Money	"If more of us valued food and cheer and song above hoarded gold, it would be a merrier world." —John Ronald Reuel Tolkien, The Hobbit Allows for resource trading at Market. Increased Caravan limit Increased Commerce Cap for all resources.
3	Records and Tallies	Bean counting is especially valuable in a world of feast and famine. Trade with allies and peaceful factions Increased Caravan limit Increased Commerce Cap for all resources
4	Warehousing	Who possesses much silver may be happy; who possesses much barley may be glad; but he who has nothing at all may sleep. —Sumerian saying Increased Caravan limit Increased Commerce Cap for all resources.
5	Land Development	You should not make a well in your field: people will cause damage on it for you. You should not place your house next to a public square: there is always a crowd there. —Instructions of Shuruppak Increased Caravan limit Increased Commerce Cap for all resources Prerequisite for Large City.
6	Contractual Relations	Guard your promises well, lest you be compelled to break them later. Increased Caravan limit Increased Commerce Cap for all resources
7	Entrepot Trade	"He shall be for an haven of ships; and his border shall be unto Sidon." —Genesis (49:13) Increased Caravan limit Increased Commerce Cap for all resources.	1,800 1,200t

Administration research

To bring about the rule of righteousness in the land, so that the strong should not harm the weak.

—Hammurabi's Code; Prologue

Administration research allows you to build one new city with each completed round, and increases your national borders. If your borders abut other nations' borders, then you'll gain strength in the pushing match. As long as you don't touch other factions' territories yet, the diameter of area covered by your borders centred around your Cities simply expands with each level attained. Administration research is also required to gain access to a variety of military units as well.

In addition, unlike the vanilla game or previous mods, Agronomics research in Warbirth relies heavily on Administration, not Science.

RESEARCH LEVEL	NAME	GRANTS ACCESS TO	COST	UNLOCKS
1	Tradition and Ritual	Beauty is all in the eye of the beholder. Low-level religious and taxation research at Temple. Increased  city limit. Increased borders	120
2	Caste System	"The existence of this world is effected by the observance of the rules respecting the four classes of men and their four stages of life" — Vatsayana, Kama-Sutra (Cap II) Low-level attrition research at Tower. Increased  city limit. Increased borders	160
3	Alienable Rights	He who exercises his own right injures no one. Medium-level taxation research at house of worship. Increased  city limit. Increased borders	160 160
4	Codified Law	The more laws and restrictions there are, the poorer people become. —Taoist saying Medium-level attrition research at Tower. Increased  city limit. Increased borders	300 300
5	Nationhood	"United we stand; divided we fall." —Aesop High-level taxation research at Temple High-level atrition research at Tower Increased  city limit. Increased borders. Prerequisite for Large City.	500 500
6	Ambassadors	A mask he still could wear so that if he wished he might deceive the eyes of Men, seeming to them wise and fair. —John Ronald Reuel Tolkien, The Silmarillion Research cost cheaper and research speed improved by 10% Increased LOS. Medium-level religious research at Temple. Increased  city limit. Increased borders	1,000 800
7	Colonial System	"The sun shall shine on no land that is not our own." —Herodotus, classical Greek author, The Persian Wars High-level religious research at Temple Increased  city limit. Increased borders.	1,500 1,500

Military research

"Thou leadest as a warrior king thine army's wings what time thou comest in the van of these swift streams."

—Rig-Veda (m. 10, hymn LXXV)

Completing Military research increases your population cap and also allows you to start upgrading your units at your military structures. Additionally, the cost of units and unit upgrades is lowered with each successive level researched.

RESEARCH LEVEL	NAME	GRANTS ACCESS TO	COST	UNLOCKS
1	Drill	"The mark of their arm is in a thousand battles." —James Scott MacPhearson, Ossian Increased Population Cap -5% production cost for units of previous ages per level ahead -10% upgrade cost for units of previous ages per level ahead	120	Tower
2	Rank and File	"Range the men by tribes, by clans, Agamemnon, that clan may bear aid to clan and tribe to tribe." —The Iliad (Cap II) Increased Population Cap -5% production cost for units of previous ages per level ahead -10% upgrade cost for units of previous ages per level ahead	100 100
3	Military Tradition	The good man wins a victory and then stops. —Taoist saying Unlocks upgrades for all cavalry. Increased Population Cap -5% production cost for units of previous ages per level ahead -10% upgrade cost for units of previous ages per level ahead	200 160	; ; Stable;
4	Soldiery	Train soldiers for a thousand days to use them for a day. — Chinese saying Increased Population Cap -5% production cost for units of previous ages per level ahead -10% upgrade cost for units of previous ages per level ahead	360 250 57 seconds (850t)
5	Hierarchy and Command	Be one in self-harmony, in Yoga, and arise, great warrior, arise. —Bhagavad-Gita (Cap 4, v XLII) Increased Population Cap -5% production cost for units of previous ages per level ahead -10% upgrade cost for units of previous ages per level ahead	650 400 1 minute 40 seconds (1500t)
6	Hereditary Service	"Kings will always use their kingly weapons. To use force is bred in them." —Gandhi Increased Population Cap -5% production cost for units of previous ages per level ahead -10% upgrade cost for units of previous ages per level ahead	1,300 500 5 minutes (2,875t)
7	The Art of War	[War] is a subject of inquiry which on no account can be neglected. —Sun Zi, Chinese military strategist Increased Population Cap -5% production cost for units of previous ages per level ahead -10% upgrade cost for units of previous ages per level ahead	1,800 1,200 3 minutes (4,550t)

While Warbirth continues to showcase population caps in multiples of 50 (as opposed to 25 in vanilla Rise of Nations), Warbirthslows down your ability to research higher level Military research owing to its nature as a Bronze Age mod.

After level 3, :

• Level 4: x 2 length.
• Level 5: x 3 length
• Level 6: x 5 length
• Level 7: x 7 length

Notes

Most likely it will be a senate-sized building. All buildings for this one are ready.