Official list of factions and Q&A about them

[satchef1]

I'll have a guess at this and say its because Portuagal didnt really exist as a nation until 1128. The mod starts about 50 years prior to that

Portugal gained its first de jure independence (as Kingdom of Galicia and Portugal) in 1065 under the rule of Garcia II. Due to feudal power struggles, Portuguese and Galician nobles rebelled. In 1072, the country rejoined León and Castile under Garcia II's brother Alphonso VI of Castile.

Portugal traces its national origin to 24 June 1128 with the Battle of São Mamede. Afonso proclaimed himself first Prince of Portugal and in 1139 the first King of Portugal. By 1143, with the assistance of a representative of the Holy See at the conference of Zamora, Portugal was formally recognized as independent, with the prince recognized as Dux Portucalensis. In 1179, Afonso I was declared, by the Pope, as king. After the Battle of São Mamede, the first capital of Portugal was Guimarães, from which the first king ruled. Later, when Portugal was already officially independent, he ruled from Coimbra.

http://en.wikipedia.org/wiki/History_of_Portugal

[Tenebrae]

Satchfe:

You are referring to Portugal, hence me mentioning the Condado Portucalense (which existed as Condado de Portvcale -a county inserted into the kingdom of Galicia - since 868. Granted to Henry of Borgogne on 1095 by King Alphonso VI of Leon for his help in the Iberian Reconquista movement, having its name changed to Condado Portucalense - or Portuguese County, in English). The Condado Portucalense actually engulfed the lands of Portus Cale (nowadays Porto), the County of Coimbra (taken from the Moors in 1091) and the southern galician parish of Tui. It had complete independent "administrative" rule from Leon.

1091 is usually considered to be the date of the begginning of the Portuguese Reconquista, 1095 the founding of Portugal (Portucale), as an independent county. Quoting the wiki you posted: "At the end of the 11th century, the Burgundian knight Henry became count of Portugal and defended his independence, merging the County of Portucale and the County of Coimbra. Henry declared independence for Portugal while a civil war raged between Leon and Castile."

In fact, the battle of S. Mamede you referred, and which is in fact the event which is normally considered to be the "founding battle"...it is not so. It was more of a struggle for independence from D. Afonso Henriques, fending off his mother's attack (D. Teresa of Leon) on Portuguese independence at S. Mamede. Once D. Afonso Henriques won in S.Mamede he had no more worries from the Leonese crown and was free to truly begin moving south towards Olisippo(Lisbon) and the Algarve...

[Tenebrae]

I forgot to mention that the official recognition in 1143 was merely a political powerplay from the part of D. Afonso Henriques to ensure the Leonese wouldn't try and seize the county once again.
Btw...Afonso Henriques is Henry's son. (and the first Dux Portvcalensis)
So, as you can see, considering the inclusion of Serbian ducates under Roman rule in the mod, I just think it to be fair for the Condado Portucalense/Portugal to be included. Given that after the Reconquista Portugal would become, together with the kingdom of Spain one of the, if not THE, most powerful nations in the whole of Western Europe...

Cheers