So, the King of France known as Louis the 15th retired to the West Indies in the latter part of his reign with his wife.

So, the King of France known as Louis the 15th retired to the West Indies in the latter part of his reign with his wife.  He used Louis the 16th as a placebo to dismiss any suggestions as to the continuation of the royalty.  He had children and sent many of them back to France over the years.  Apparently, Mozart is one of these children and it is not entirely clear how long Louis 15th lived but much of his decision to leave France was predicated on his thought and belief that he was the King of Israel and the resentment of the rest of Europe was too much to fathom.  He eventually went to Israel but returned to the West Indies; Haiti in the 1800's as the story is told and remained settled in a secluded and well fortified part of Haiti for a very long time.    It is not entirely clear when he died but his intention was to begin with world peace when he saw the musket and too many of them in people's hands as if they were being given out for free. He also saw what happened when all of the guards had them. There was an accidental shooting of a member of the French royal family.   It seems Louis the 14th was the victim of an accidental shooting. 

 The Musket   https://en.wikipedia.org/wiki/Musket

Europe

Musketeers firing muskets in a historical reenactment from the Thirty Years' War.

Gunpowder flask. Carved in relief with Adam and Eve on either side of tree of Life. The back is plain, the background is gilded, the mounts silver gilt. Behind the root of the tree is the figure of a stag; at the top is a coat of arms with the letters I.Z.W., Victoria and Albert Museum

Hand cannons (handgonnes) arrived in Europe from Asia sometime in the early 14th century. They were more commonly used by the early 15th century, particularly in the Hussite wars. It is possible that the noise was at least as important as the missile, for the effect on the horses of the enemy knights. These were very short ranged, inaccurate and difficult to load and fire. Hand cannons had a crude handle, or no handle at all. A wooden stock was added, allowing the weapon to be more easily held and fired. The hand cannon evolved into the arquebus by the mid 15th century. Early arquebusiers just held on to the rope match, or attached it to their belt, which was dangerous since the match could accidentally contact the touch hole as the arquebusier moved around while loading the weapon in battle.

Asia

Early matchlocks as illustrated in the Baburnama (16th century)

The hand cannon was first used in China in the 13th century.^[16] The hand cannon was a very simple weapon, consisting of a metal tube enclosed on one end, with a touch hole drilled into the side of it. Gunpowder and ammunition were placed in the tube, and a match (a short piece of burning rope) was touched to the touch hole, causing the powder to explode and the ammunition to be discharged.
Imported arquebuses were utilized in China during the Ming Dynasty (1368–1644) and Qing Dynasty (1644–1911). The Chinese used the term "bird-gun" to refer to arquebuses and Turkish arquebuses may have reached China before Portuguese ones.^[17] In Zhao Shizhen's book of 1598 AD, the Shenqipu, there were illustrations of Ottoman Turkish musketmen with detailed illustrations of their muskets, alongside European musketeers with detailed illustrations of their muskets.^[18] There was also illustration and description of how the Chinese had adopted the Ottoman kneeling position in firing while favoring European-made muskets.^[19]
The Mughals introduced arquebuses into India.^{[citation needed]} The guns came into wide use by not only the Indian Mughal Empires but also by rival South Indian kingdoms. The muskets that the Mughals and the rest of India used were often made of the high quality wootz steel. These Indian muskets were manufactured by the thousands and could even use stones instead of balls if needed.^{[citation needed]}