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1862
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| September 1 | Organized at Brattleboro |
| September 7 | Left State for Washington, D.C. and attached to attached to 1st Brigade, Haskins’ Division, Military District of Washington for duty in the Defences of Washington north of the Potomac |
| December 10 | Designation of Regiment changed to 1st Vermont Heavy Artillery Regiment (see page for continuation of history) |