No he did't invent it but he is probably the first one who used rockets tech in war.
Rockets invented by Chinese.
@Joe Shearer @Khafee
Not even close to the second place.
List of North Korean historical claimed milestones
The official North Korean KCNA and Uriminzokkiri websites have published on Wednesday 23rd October 2019, more than fourteen years later, nearly the same list of historical claimed milestones, and first posted on 30th May 2005.
The first KCNA version published on 30th May 2005:
World's First Rocket Made in Korea
Pyongyang, May 30 (KCNA) -- "Rocket" weapons were made and used by Korea already in the period of Koguryo (B.C. 277-A.D. 668). The first "rocket" was very simple but its principle is similar with that of modern one.
A jet-propelled weapon called Kwanghwi demonstrated its might in a battle near the castle in Mt. Pukhan in 661.
People of Koryo (918-1392) made a "rocket" called Hwajon.
Hwajon was 726 millimeters long and its arrowhead 90 millimeters long. The arrow was shot by lighting the cartridge.
According to a historical record, Koryo manufactured lots of Hwajon around 1127 and deployed them in vantage points for national defence.
On the basis of arrows with fire wicks made in the period of the three kingdoms, Koreans developed Singijon, the origin of multistage rocket, in the early 15th century.
There were three kinds of Singijon according to their sizes, types and powder-cartridges.
The small one was a two-stage rocket. The medium one with one more small cartridge than the small one was a three-stage rocket, while the large one with four cartridges and wings was a four-stage rocket.
Having a great firing power, they could strike far-off targets on land and big warships. The weapons were widely used during the Imjin Patriotic War (1592) against the Japanese invaders and other battles against invaders. They were also used as signal means.
They are precious historical relics showing the intelligence and patriotism of the Korean nation.
http://web.archive.org/web/20141012071251/http://www.kcna.co.jp/item/2005/200505/news05/31.htm
The KCNA repost of 23rd October 2019:
Singijon, Origin of Multi-stage Rocket
Pyongyang, October 23 (KCNA) -- The Korean people made a jet-propelled weapon for the first time in the world.
Kwanghwi, which had the same operating principle with rocket, came into being in the period of Koguryo (B.C. 277-A.D. 668), and Singijon, the origin of multi-stage rocket, appeared in the early 15th century.
Singijon was classified into small, medium and large one according to its size, type and structure of reaction powder-flask.
The small-sized Singijon was a kind of two-stage rocket as it could fly far to a distance by the force of gas emitted from two powder-flasks installed in the tail of an arrow.
The other two weapons equipped with more powder-flasks could fly like three-stage and four-stage rockets.
In the mid-15th century, dimensions of Singijon were standardized on a nationwide scale.
This weaponry was used in the battles of Kyongju and Haengjusan castles during the Imjin Patriotic War (1592-1598). -0-
https://archive.fo/m2OnI/41357dd1b54b90e76e8efd12fa1c26bc9b98b185.gif ; https://archive.fo/m2OnI/700073e33768f86bd1494ab43c51c66ae77d9e8c/scr.png ; http://web.archive.org/web/20191023...ew024/national proud/content/img/singizon.gif ; http://pyongyang.news-site.net/new02/new024/national proud/content/singijon.html
▲ 3. Singijon, Origin of Multi-stage Rocket
http://web.archive.org/web/20191023...zokkiri.com/index.php?ptype=igisa1&no=1181495
http://archive.fo/7Gcmq
A recap of the most important claimed milestones:
• "Rocket" weapons were used by Korea already in the period of Koguryo (B.C. 277-A.D. 668).
• Jet-propelled weapon called Kwanghwi used in the battle near the castle in Mt. Pukhan in 661.
• People of Koryo (918-1392) made a "rocket" called Hwajon.
• Koreans developed Singijon, the origin of multistage rocket, in the early 15th century.
• Koreans developed winged rockets, as the largest type of multistage rocket and made of four-stages.
• Koreans also developed Anti-Ship versions during the Imjin Patriotic War (1592).
• All these, centuries before the Europeans.