Back 509th Composite Group AST 509th Composite Group German 509th Composite Group English 509th Composite Group Spanish 509. raskas erityispommitusrykmentti Finnish 509th Composite Group French 509th Composite Group ID 第509混成部隊 Japanese 509-я смешанная авиагруппа Russian 509-та змішана група Ukrainian
| 509th Composite Group | |
|---|---|
.gif) 1946 emblem of the 509th Composite Group while part of the 58th Bombardment Wing, Very Heavy | |
| Active | 17 December 1944 – 10 July 1946 |
| Country | United States |
| Branch |  United States Army ( Army Air Forces |
| Type | Bombardment and air transport composite |
| Role | Atomic warfare |
| Size | 1767 personnel, 15 B-29 and 5 C-54 aircraft |
| Part of | 313th Bombardment Wing Twentieth Air Force |
| Garrison/HQ | North Field (Tinian), Mariana Islands |
| Engagements |  
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| Commanders | |
| Notable commanders | Paul Tibbets |
The 509th Composite Group (509 CG) was a unit of the United States Army Air Forces created during World War II. They tasked with the operational deployment of nuclear weapons. It conducted the atomic bombings of Hiroshima and Nagasaki, Japan, in August 1945.