Far Flung Fortifications Fit VII

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’.

Thirty-one

If reading a 32-point compass rose from north in a clockwise direction what point follows S?

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Thirty-two

What word is defined as a ‘facility on a watch for measuring speed’?

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Thirty-three

What is the Chinese province whose capital city is Chengdu?

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Thirty-four

The Troy Dam and Lock, on the Hudson River at Troy, New York, are operated by (the) …

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Thirty-five

During what war is the 1854 poem The Charge of the Light Brigade set?

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Good luck! I’ll post the answers at a later date.

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