SEOUL-- The following is a chronology of major events related to the deployment of the U.S. Terminal High Altitude Area Defense (THAAD) system in South Korea.

2014

June 3 -- The United States Forces Korea (USFK) commander Gen. Curtis Scaparrotti tells a forum that Washington is considering deploying THAAD in South Korea to counter North Korea's threats.

2015

Feb. 4 -- China's defense minister Chang Wanquan expresses concerns over the possible deployment of the advanced U.S. missile defense system in South Korea during talks with his South Korean counterpart Han Min-koo.

March 11 -- South Korea's presidential office says no decision was made on whether to allow the U.S. to deploy the THAAD battery in South Korea. It added that there was neither request from the U.S. to deploy the system nor consultations between the allies.

April 10 -- U.S. Defense Secretary Ashton Carter says his country is not ready to begin discussions on the possible deployment of the THAAD system on South Korean soil.

May 21 -- South Korea's defense ministry says that Seoul would join consultations with Washington if the U.S. requests a discussion on the possible deployment of the THAAD system.

2016

Jan. 6 -- North Korea conducts its fourth nuclear test, claiming that it succeeded in detonating a hydrogen bomb.

Jan. 13 -- President Park Geun-hye says in a press conference that her country will review the issue of whether to allow the American forces here to deploy the THAAD system from the perspective of national security and interests.

Feb. 7 -- South Korea and the U.S. announce that they agreed to begin negotiations for the "earliest possible" deployment of the THAAD battery on South Korean soil in response to North Korea's launch of a long-range rocket.

March 4 -- South Korea and the U.S. officially launch a joint working group to discuss the possible deployment of the THAAD system in the Northeast Asian country.

March 31 -- Chinese President Xi Jinping tells U.S. President Barack Obama during a summit that China is "firmly opposed" to the deployment of a THAAD battery in South Korea, according to China's assistant foreign minister Zheng Zeguang.

June 4 -- Defense Minister Han Min-koo says that South Korea has the clear intention to deploy the THAAD system on its soil during the Asia Security Summit held in Singapore.

June 24 -- Defense Minister Han Min-koo tells reporters that the THAAD system is believed to be capable of intercepting North Korea's intermediate-range ballistic missiles if it is deployed in South Korea.

July 5 -- South Korea's defense ministry says Seoul and Washington have yet to decide when and where to deploy the THAAD system.

July 8 -- South Korea and the U.S. announce the decision to deploy THAAD on South Korean soil.

2017

Feb. 28 -- South Korea's defense ministry signs a formal land swap deal with Lotte Group for the THAAD installation.

March 6 -- The first elements of the THAAD system, including two launchers, arrives in South Korea. A THAAD battery is made up of six launchers.

April 20 -- South Korea and the U.S. complete a land provision process for the THAAD deployment.

April 28 -- U.S. troops in South Korea begin installing the equipment for the THAAD system at a site in Seongju.

May 30 -- President Moon orders a special probe into an "undisclosed" entry of four THAAD missile launchers into South Korea.

July 29 -- Moon orders the start of consultations with the U.S. over the provisional deployment of the four additional THAAD launchers after North Korea fires another intercontinental ballistic missile.

Sept. 4 -- South Korea's environment ministry says it conditionally approved the result of a small-scale environmental impact assessment on the THAAD system partially operational at the former golf course in Seongju.

Sept. 6 -- South Korea's defense ministry announces the four additional missile launchers will be deployed on Sept. 7.

Source: Yonhap News Agency