With the deployment of Kooryong to the South Korean Army since the 1980s, it was temporarily able to maintain a similar balance to North Korea's artillery power.

[11][12] Each Chunmoo launcher is paired with an K239T Ammunition Support Vehicle (ASV) which uses the same type of truck chassis and carries four reload pods.

South Korea's Defense Acquisition Program Administration (DAPA) spent 131.4 billion won ($112.4 million) on the project to create a replacement for the K136 Kooryong MLRS.

[16][17] In June 2022, South Korean Agency for Defense Development (ADD) revealed efforts to increase the range of the Chunmoo's 239 mm rockets to 200 kilometers (120 mi).

[18][19][4] On 27 April 2022, South Korean Defense Acquisition Program Administration announced a plan to develop a vehicle-mounted tactical surface-to-surface guided weapon (Ure-2).

[22] On 24 April 2024, ADD conducted a test launch of CTM290 integrated into the Homar-K system in the presence of Poland's Deputy Defense Minister Paweł Bejda and government officials from each country.

[24] Built to meet Polish military requirements, the system is equipped with TOPAZ Integrated Combat Management System and is armed with a South Korean 239 mm CGR-080 guided rocket produced in Poland under license and a 600 mm CTM-290 tactical ballistic missile (Chunmoo Tactical Missile)[15] with a range of 290 kilometers (180 mi).

On 27 August 2022, Poland's defense minister, Mariusz Błaszczak, said there are ongoing negotiations to acquire South Korea's rocket artillery system.

[36] A supply contract for 288 Chunmoo MLRS mounted on Jelcz 8x8 chassis and equipped with Polish TOPAZ Integrated Combat Management System along with 23 thousand missiles with the range of 80 and 290 kilometers was signed in Poland on October 19, 2022.

[37][38] On 20 August 2023, first Homar-K, which completed system integration and testing in South Korea, was deployed to the 18th Mechanised Division of the Polish Land Forces after being delivered to Poland.