| Navy | The US Navy |
| Type | Medium landing ship |
| Class | LSM |
| Pennant | LSM 421 |
| Built by | Dravo Corp. (Wilmington, Delaware, U.S.A.) |
| Ordered | 8 Apr 1944 |
| Laid down | 18 Oct 1944 |
| Launched | 30 Nov 1944 |
| Commissioned | 24 Dec 1944 |
| End service | 24 Oct 1946 |
| History | Decommissioned on 24 October 1946 |
We don't have any commands listed for USS LSM 421 (LSM 421)
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