As a Hellenistic culture group country in the region of Asia, Kos has access to the Euxine Sea Hellenistic cultural mission tree The Hospitable Sea if it can be come independent and grow to own at least 25 territories, directing it to expand its influence in the region and dominate the coasts of the Euxine Sea. Like most other Hellenistic group countries, if Kos conquers territory in Greece it can also get the Greek cultural mission tree Pan-Hellenic Government and attempt to unite the Greek city-states into a new Hellenic League.
Like all other countries, Kos also has access to the generic missions.
As a Hellenistic culture group country, Aeolia has access to the decision to form the Hellenistic Empire. Note that this requires reforming into a monarchy.
id
Reunite Alexander's Empire
For too long parasites and scavengers have made a feast of the Great Empire that Alexander spent a lifetime building. It is time we do away with all claimants, usurpers and delusional provincial strongmen. There can be only one authority within the empire of Alexander the Great, one upholder of the great Hellenistic legacy that this great man founded.
That one power could not possibly come from any dynasty but our own. Only a family that respects the Argead traditions can legitimately claim its legacy.
Get claims on all unowned provinces in the regions of Parthia, Syria, Ariana, Bactriana, Media, Persis, Gedrosia, Mesopotamia, Assyria, Bithynia et Paphlagonia, Cappadocia Taurica, Phrygia, Cilicia, Asia, Greece, Palestine, Gandhara, Lower Egypt, Upper Egypt, Macedonia, and Thrace
Kos
Kos is an island nation near 
Rhodes.
Hellenic League.
Hellenistic Empire. Note that this requires reforming into a monarchy.
feudatory of 
Egypt.
