Union Order of Battle at Gettysburg
Army of the Potomac, XII Corps, 1st Division

1st Div., 1st Brigade, XII Corps Colonel Archibald L. McDougall Born in New York, Age c.46	1st Div., 2nd Brigade, XII Corps Brigadier General Henry Hays Lockwood Born in Delaware, Age 48 Wikitree Listing	1st Div., 3rd Brigade, XII Corps Brigadier General Thomas H. Ruger Born in New York, Age 30 Wikitree Listing
Regiments: 5th Connecticut | 221 men 20th Connecticut | 321 men |Roster 3rd Maryland | 290 men 123rd New York | 495 men |Roster 145th New York | 245 men |Roster 46th Pennsylvania | 262 men |Roster	Regiments: 1st Maryland Eastern Shore 532 men 1st Maryland Potomac Home Brigade 674 men 150th New York 609 men Roster	Regiments: 27th Indiana | 339 men 2nd Massachusetts | 316 men | Roster 13th New Jersey | 347 men | Roster 107th New York | 319 men | Roster 3rd Wisconsin | 260 men