A small quiz

Here is a small quiz.

 * 1) What is the planned S. African “Volkstaat“?
 * 2) Who was Andries Pretorius?
 * 3) What was the Boers’ “Great Trek” in S. Africa?
 * 4) In which nation is the Province of Gauteng?
 * 5) In which nation is the Highveld?
 * 6) When was the S. African town of Klerksdorp built?
 * 7) What NATO nations used the MGM-31 Pershing missile?
 * 8) What is the M983 HEMTT vehicle used for?
 * 9) What does the firm Oshkosh Corporation make?
 * 10) Which nation used the Blue Steel missile?
 * 11) Who invented the personal usage submarine DeepFlight Super Falcon?
 * 12) Where was the ancient Balkans city of Dionysopolis?
 * 13) When was the WWI Battle of Transylvania?
 * 14) What was the topic of the Treaty of Bucharest (1916)?
 * 15) Has the Brașov metro zone got a population of over 500,000?
 * 16) What is the Bhutan Observer?
 * 17) Where is the Raidāk River?
 * 18) Where is the Brünig railway line?

Answers
Answers are found on Wikipedia pages.