Issol A'i

The Issol A'i (Arithide ['issœl 'a.i]) or Strait of A'i is a narrow strip of water at the eastern edge of the Chisthian Sea separating the continents of Marcasia and Arophania. Measuring but 16km across from Cape Beytes on its north shores to Cape Somorra, the strait is a rich fishing ground and a vital passage on the main trading routes between Marcasia, Arophania and Istheusia; it was by way of this strait that the Areth first arrived in Calagia from Erdia.

On or within 50km of the Issol A'i lie three historically very significant cities: on Arophania, directly overlooking the strait is Isphea, the ancient imperial capital; some kilometres up the Taphae-Nes river delta lies Lazea, the Areth political, economic and cultural centre; on the opposite bank, little after the point where the strait opens into the Denurean Sea, is the old city of Tannea, capital of the province of Tannaea.

Names

The Issol A'i is also called the Deis Atherris ['ðe.is 'aθəris] in Dethric, or the Kunpaana Sieka in Tannaean, both of which mean "Strait of Constriction" in the respective languages. In most other languages of Ilethes, the name of the strait is simply borrowed or derived from the Arithide. The Arithide etymology of the name is uncertain.

Strategic significance & importance

Due to its strategic location at the centre of the three Old World continents, Marcasia, Arophania and Istheusia, and its status as the only eastern exit from the Chisthian Sea, the Issol A'i has played very significant and important roles throughout history, and prehistory (see below.

Rise of the Areth

The Areth, having very early settled on both shores of the Chisthian, by way of the strait, naturally came to dominate the area. The lack of large expanses of arable land pressured the Areth to turn to the sea, and the rich fishing grounds of the Issol A'i provided them with a natural centre of settlement. Subsequently realising the value of their location astride the major transport routes, the Areth capitalised heavily on it through developing, encouraging and stimulating trade, which was to be the mainstay of their economy for many years to come.

Feudal struggle for control

Main article: Battles of the Strait

Modern international relations

Situated at a shipping lane bottleneck, the strait has at times served as a very useful tool in international diplomacy.

• In the 1935 Zesou Crisis, Arithia successfully averted a potentially catastrophic invasion of its ally, Zesou, by closing the strait to ships, military or otherwise, belonging to, registered in or flying the flags of the states party to the Cordial Alliance, which was orchestrating the aggression. The blockade lasted for almost 11 months, during which the Arithide navy sank more than 1,200 merchant ships, as well as almost 400 warships of the Alliance in three separate naval battles. The closure was lifted when hostilities ended and a peace treaty was signed, and modern historians estimate the cost of the blockade to the Alliance members to have been between 8 and 15% of GDP.

Prehistorical significance

It is widely conjectured that the strait served, for a long period of time before it was submerged by rising sea levels, as the only land bridge connecting Marcasia to Arophania, and therefore the only conduit by which life could spread southwards, including two (rice, wheat) of the three (barley) most important types of grain grown today, and many animal species.

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