| Operation Arbor | |
|---|---|
| Information | |
| Country | United States |
| Test site |
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| Period | 1973-1974 |
| Number of tests | 18 |
| Test type | underground shaft, underground tunnel |
| Max. yield | 150 kilotonnes of TNT (630 TJ) |
| Test series chronology | |
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The United States's Arbor nuclear test series was a group of 18 nuclear tests conducted in 1973-1974. These tests followed the Operation Toggle series and preceded the Operation Bedrock series.