UnScramble this Word: d e v p r d e a?

Questions

History - What 19th century war between Russia and England, Turkey, Britain and France, was named after a peninsula in the Black Sea?

History - What English city was known to the Romans as Venta Bulgarum?

History - What Shakespearean king was actually king of Scotland for 17 years?

History - What United States president was in office during the civil war?

History - What colour was Diana Spencer's engagement photograph suit?