UnScramble this Word: r i r c t a h b?

Questions

Which country's borders was established in 1919 by the 'Treaty of St.Germain'?

In which country is the town originally called Angostura, a place which gave its name to a herbal bitter drink?

The film Apocalypse Now was based on whose novel?

Which nut is used to make Marzipan?

After Paris which is the largest French speaking city in the world?