SELECT "Date founded/ founder" FROM table_26715 WHERE "Notes" = 'prima Italica:raised for aborted Caucasus war'
when notes are prima italica:raised for aborted caucasus war, when was that founded?
CREATE TABLE table_26715 (
    "Legion no. and title" text,
    "Main legionary base" text,
    "Emblem" text,
    "Date founded/ founder" text,
    "Date disband" text,
    "Castra legionaria (legion bases) * = main base. Start date 31BC if unspecified" text,
    "Notes" text
)