Far Flung Fortifications Fit II

Over the next nine days, 46 questions will be posed, one for each letter of the alphabet plus 20 others (There will be six one day). The 20 others appear as duplicate letters, and these duplicates spell out the name of the Roman Fortification which in CE 150 to 160 was the furthest boundary from the city of Rome, and the country that it was situated in. It is a three-word answer with eight letters in the first part of the name and four in the second part; the country has eight letters in its name. 
BTW Fit, as used in the post title, is an archaic term meaning ‘a division of a song, ballad, or story’.

Six

Beyoncé Knowles portrayed which singer in the 2008 film Cadillac Records?

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Seven

What US president was in office for 12 years and 39 days?

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Eight

What character sings Memory at the climax of the musical Cats?

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Nine

Of what country did Haakon VIII become king in 2006?

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Ten

In 1873, a club published the rules of polo, which are still followed by most of the world to this day? What club?

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Good luck! I’ll post the answers later.

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