1st Security Group (South Korea)
| 1st Security Group | |
|---|---|
| 제1경비단 | |
Soldiers from the 1st Security Group in training at Segomjeong, Seoul | |
| Active | 17 December 1996 – present |
| Country | South Korea |
| Branch | Republic of Korea Army |
| Type | Combined arms |
| Role | Guard |
| Size | At least 520 |
| Part of | Capital Defense Command |
| Garrison/HQ | Seodaemun District, Seoul |
| Engagements | 2024 South Korean martial law crisis |
| Commanders | |
| Current commander | Colonel Cho Sung-hyun |
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The 1st Security Group (Korean: 제1경비단) is a military formation of the Republic of Korea Army. The group is subordinated to the Capital Defense Command. It headquartered in Seodaemun District, Seoul, and have the mission to guards Mt. Bukak, Mt. Inwang, the central part of downtown Seoul, and the Blue House.