The Gettysburg Cyclorama: The Turing Point Of The Civil War On Canvas -- Chris Brenneman And Sue Boardman -- c. 2015

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US Civil War:

• regiment: 250 - 350 men (USAF: squadron / lt col or major)
• each regiment: 10 companies, each with 25 - 35 men
• brigade: 1,500 men (USAF: group / colonel)
• three to five regiments
• division: 3,000 - 7,500 men (USAF: wing / BG)
• two to five brigades
• Southern army: generally more brigades per division than the Union
• thus, a Southern division was larger than a Union division
• 7,000 vs 3,500
• corps: 20,000 (Southern); 10,000 (Union) (USAF counterpart?)
• three divisions

Or going the other way:

• army
• corps (three divisions)
• division (two to five brigades) -- BG, USAF wing
  
• brigade (three to five regiments -- colonel, USAF group
  
• regiment (ten companies) -- major or lt col / USAF squadron
  
• companies -- captain / USAF flights
  
• platoons (later)
  

Gettysburg:

• Southern army:
• three corps (20,000 men each)
• plus cavalry and artillery
• total: 75,000 men

• Union army:
• seven corps (11,000 men each)
• plus cavalry and artillery
• total: 90,000 men

• Union units: numerical designations
• I Corps
• 2nd Division
• 3rd Brigade

• Southern units: in general, named after their commanders
• Longstreet's corps
• Pickett's division
• Armisteaad's brigade

• Artillery, grouped together in a "battery":
• Union: six cannon in a "battery"
• Confederate: four cannon in a "battery"

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The Battle of Gettysburg

The Gettysburg Cyclorama: The Turning Point Of The Civil War On Canvas -- Chris Brenneman And Sue Boardman -- c. 2015.

July 1 - 3, 1863 -- three days.

Terms:

• "Pickett's Charge" -- the third day
• "the bombardment or the cannonade"
• "copse of trees"
• "the stone wall"
• "the Angle"
• from Seminary Ridge, marching toward Cemetery Ridge -- a mile wide
• began to converge on the center of the Union line near the copse of tree and the angle in the stone wall
• General Armistead broke through, but mortally wounded
• came to be known as "the high water mark of the Confederacy"
• Pickett's charge failed
• the US Civil War was effectively over but went on until 1865

Notes: