Also, I'm going to send an e-mail to that posted address with a correct version of the map that shows where the capital is since whoever edited my poor map job deleted it.
2x2 capitol cities were replaced by pixel circles.
Violence between ethnic Avalonians and ethnic Britons comes to a head as a Briton militia is called in to suppress a group of Avalonians performing religions rites. Angered at the interruption of their sacred rituals, the Avalonians riot and in the ensuing conflict all members of the militia group of about 25 are killed and around three times as many ethnic Avalonians meet the same fate. As news of this moves throughout the region, more violence erupts.
Within not too long, The Council hears of this and approves the use of force to evacuate ethnic Avalonians from the land or to aid in taking the land that the Avalonians have come to call their home away from the fatherland. The High Priest condones this action, stating that the interruption of the rite may cause "global catastrophe" and that the Gods must be satisfied by the blood of the Britons. The Order declares that the Britons in that area are dishonorable to the level of being sub-human.
The Avalonian navy in the Sea of Ormica is prepped to depart and begin the attack. First Avalonian warships will capture or destroy Britonic warships in the area of interest using Avalonian dominance in numbers, naval and battle experience, and technology (rams and awesome iron). Then Avalonian ships will land and establish a beachhead outside of where Avalonia intends to invade (in other words, just before where the peninsula gets thinnest). Following this, Avalonian transport vessels will bring ground troops, horses, weapons, and supplies to the beachhead. When there are sufficient troops there, the cavalry will be sent in and reinforced continually by land and sea.
75 galleys (warships) will be used, each with a full crew, and two or three times that or more in armed transports ships; more will be chartered from peoples not loyal to the Britons if needed. The Avalonian ground force will contain around 1,500 horsemen when it begins its assault (assuming that scouts indicate that such a force will be sufficient to begin the campaign) and reinforcements will amount to 8,500 more horsemen (they'll come to the warzone in batches of 500 or so at the beachhead or rendezvous with the main Avalonian force). Reinforcement waves will be only a few days apart due to the massive number of Avalonian ships to be used to transport them.
Edit:
The naval force will include 100 or warship galleys and focus only on the Northern shore of the peninsula, taking and defending.