Here are the civilopedia entries for the 6 CTU's. Note the Pilgrim has been renamed the Missionary. I also made the caravan capturable to help offset some of their advantage. So keep them well protected.
#PRTO_Greek_Fire
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^Scientific nations have always been trying to think of newer and nastier ways to destroy their enemies. The development of Greek Fire along with a reliable way to deliver it struck fear in the hearts of their enemies for centuries.
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^Primitive artillery with a flare, catapults firing [greek fire] are even more devastating siege weapons in than their regular counterparts. They are used to $LINK<bombard=GCON_Combat> city defenses to soften the attack for accompanying soldiers. Catapults have no attack or defense power, so they should be protected by an escort. Finally, they are wheeled so they may not enter $LINK<mountains=TERR_Mountains> or $LINK<jungles=TERR_Jungle> unless following
a road.
#DESC_PRTO_Greek_Fire
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^Greek Fire is a gelatinous, incendiary mixture, that was used in warfare before gunpowder was invented. Flammable liquids had long been in use, but it was not until the 7th century that Greek fire was invented, possibly by Callinicus, an Egyptian architect who had fled from Syria during the Muslim invasions. The substance apparently ignited spontaneously, and could not be extinguished by water.
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^The formula of Greek fire was closely guarded as a state secret for many centuries by the Byzantine Empire. The exact composition of Greek fire is still disputed, but it was probably composed of a mixture of flammable materials such as sulfur and pitch in a petroleum base.
#PRTO_Serf
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^{Building a Serf}: A city that builds a [serf] loses one citizen from its population.
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^{Serf Jobs}: Serfs can $LINK<improve=GCON_Worker_Jobs> the countryside to make it more productive.
The efficiency of a serf (how quickly it works) depends upon its $LINK<government=GCON_Governments> type.
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^{Joining a City}: A serf may also be used to increase the population of an existing city;
when the serf is active on a city, click the "Join City" button. The serf disappears and
the city's population gains one citizen.
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^Note that serfs may be captured and used by rival civilizations.
#DESC_PRTO_Serf
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^In primitive, hunter-gatherer cultures, there was no division of labor. But every civilization since has had a
worker "class," devoted to the production of goods and the unskilled tasks necessary for the maintenance of society. These agricultural laborers were known as serfs and were legally bound to reside and labor on the land owned by their lord. The word serf comes from the Latin word servus, which means servant or slave. The serfs comprised the vast majority of the population of early society and worked to feed themselves, their superiors, and the people of the towns and the church. Although the serfs were not slaves, they were not really free. They could not leave the land owned by their lord. They were obligated to provide physical labor as well as to pay taxes and other obligations. Serfs were at the bottom of the European system of social, political, and economic relations.
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^Social institutions similar to serfdom were known in ancient times. The status of the helots in the ancient Greek city-state of Sparta resembled that of the medieval serfs, as did the condition of the peasants working on government lands in ancient Rome. These Roman peasants, known as colini, or "tenant farmers," are some of the possible precursors of the serfs. However, medieval serfdom really began with the breakup of the Carolingian Empire around the 10th century AD. The demise of this empire, which had ruled much of the western Europe for more than 200 years, was followed by a long period during which no strong central governments existed in most of Europe.
#PRTO_Missionary
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^Religious civilizations don't create normal settlers like other civs. Instead they produce [missionaries]. Missionaries wander the countryside searching for suitable places to build new missions and spread the good word of their religion. Unlike other settlers, pilgrims can move 2 tiles per turn in their religious zeal.
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^{Building a Missionary}: A city that builds a missionary loses two citizens from its population.
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^{Founding Cities}: Missionaries are used primarily to found new cities. Move the missionaries to
the desired city site, and, when the missionary is active in that square, press B.
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^{Joining a City}: A missionary may also be used to increase the population of an existing city; when the
missionary is active on a city, click the "Join City" button. The missionary disappears and the city's population gains two citizens.
#DESC_PRTO_Missionary
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^When citizens were filled with the desire to witness by word and deed, at home and abroad, to the beliefs of their religion, so that others may come to know and live the truth as they understand it, they formed a missionary movement and left their homes in search of souls to teach. Once a suitable site was found, the missionaries would build their new church and homes, develop the land surrounding the the mission and teach their religion to the indiginous peoples that they found there. Eventually the whole process repeated, and the new mission would send out missionaries of its own. This process allowed civilizations and religions to spread throughout history, from the empires of the ancient world to the discovery and settlement of the New World.
#PRTO_Brave
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^Militaristic civilizations are able to produce better warriors than other nations.
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^The [brave] is a dangerous opponent, armed with axe and knife and the blessing of his spirit totem.
#DESC_PRTO_Warrior
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^The earliest military forces were simply the citizens of the city, armed with whatever implements they could
use as weapons. In many ancient societies the young men were forced to learn the art of war. They were trained from their youth in the tools of warfare and forced to pass through rights of initiation to prove their manhood. If they survived the ordeal they were welcomed into the community and for their bravery and courage they were honored as braves. These young men were far superior to the common warrior and were often able to take on forces twice their numbers.
#PRTO_Ranger
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^[Ranger] are unarmed, non-combat units that can move three squares per turn over land, regardless of terrain.
This makes them very adept at exploring the wilderness.
#DESC_PRTO_Ranger
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^Throughout history there are those hearty souls who thirst for adventure and long for the freedom of the great outdoors. These men and women leave the confines of the cities and become one with with wilderness. They are more comfortable in the forest than they are in the towns and cities of civilized society. These rangers, those who live on the range, are perfect scouts and explorers, and spend most of their time looking for the next frontier.
#PRTO_Caravan
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^Commercial civilizations developed and relied on trade to spread their influence. One of the key tools in their trade empires was the Caravan. Once a city builds a caravan it can send it off to distant cities to help $LINK<hurry=GCON_Hurry_Production> production in a city. When the caravan does this it disappears.
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^Note that caravans may be captured and used by rival civilizations. They should always be well guarded.
#DESC_PRTO_Caravan
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^Trade has been a major source of income to civilizations throughout history. Journeying to distant lands, caravans exchanged their loads of goods for money or other items of value. In addition, the traders who accompanied the caravans often brought back new knowledge about the advances made by the civilizations with whom they did business. Marco Polo, for example, went with traders to China. He remained there for many years, and brought back much valuable information to the West.
But if you need any help with ideas, I'd be glad to contribute what I can.
