The gift of a heron provoked which war? The Weekend quiz

The questions
1 Which conflict was provoked by the gift of a heron at a banquet?
2 What 1983 release is the bestselling 12-inch single ever?
3 Where is the Great Green Wall being grown?
4 In digital transactions, what is an NFT?
5 Whose California castle was designed by Julia Morgan?
6 What was the Pierrepoint family trade?
7 Screenplays are written in which typeface?
8 What was unique, managerially, about Forest v Malmö in 1979?
What links:
9 Congress; BJP; AITC; DMK; YSRCP?
10 Linnet Doyle; Lanfranco Cassetti; Pamela Reeves; Lucius Protheroe?
11 Brick; claw; club; ball pein; geological?
12 Romulus Augustulus (west) and Constantine XI Palaeologus (east)?
13 Balor; Odin; Polyphemus; the Graeae?
14 Muhammad Ali; Will Smith; Eli Goree?
15 Salzburg and Stowe, Vermont; Gary, Indiana; Ogden, Utah?

The answers
1 Hundred Years’ War (according to The Vows Of The Heron poem).
2 Blue Monday by New Order.
3 Africa (southern edge of the Sahara).
4 Non-fungible token.
5 William Randolph Hearst.
6 Hanging (executioners).
7 Courier (industry convention).
8 Only European Cup final where both managers were English (Brian Clough and Bob Houghton).
9 Indian political parties.
10 Titular victims in Agatha Christie novels: Death On The Nile; Murder On The Orient Express; The Body In The Library; The Murder At The Vicarage.
11 Types of hammer.
12 Last Roman emperors.
13 Mythical beings with one eye: Celtic myth; Norse; Greek.
14 Played Muhammad Ali in films: The Greatest; Ali; One Night In Miami.
15 Homes of musical families: Von Trapps; Jacksons; Osmonds.