CREATE TABLE table_26714 ("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)

When did svishtov , bulgaria disband?
SELECT "Date disband" FROM table_26714 WHERE "Main legionary base" = 'Svishtov , Bulgaria'
SELECT "Date disband" FROM "table_26714" WHERE "Main legionary base" = 'Svishtov , Bulgaria'