Brig. Gen. Francis Marion, who had been preparing to join Brig. Gen. Thomas Sumter at Farr's Plantation, learned of Lt. Col. John Watson’s advance and lay in wait for him at Wiboo Swamp. The site was a marshy passage way located on the Santee Road between Nelson’s and Murry’s Ferry. McCrady gives Brig. Gen. Marion’s strength as 250. Others give it closer to 500.

Lt. Col. Watson’s advance force of some Loyalist militia dragoons under Lt. Col. Henry Richbourg clashed with some of Brig. Gen. Marion’s cavalry under Lt. Col. Peter Horry, after which both fell back. When Brig. Gen. Marion tried to send forth Lt. Col. Horry once more, Lt. Col. Watson’s infantry and artillery held Lt. Col. Horry back.

The Loyalists of the SC Rangers (Harrison’s Corps), under Maj. Samuel Harrison, then came up once more to charge the Patriots, but were arrested in their movement momentarily by one of Lt. Col. Horry’s horsemen, Gavin James, apparently a mighty individual, who single-handedly slew three of them before retiring.

Brig. Gen. Marion ordered in his horsemen under Capt. Daniel Conyers and Capt. John McCauley who drove the Rangers back, killing Maj. Harrison. Lt. Col. Watson’s force then continued their advance to Cantey’s Plantation file miles northwest of present-day Greeleyville (Williamsburg County) to rest.

Brig. Gen. Francis Marion - Commanding Officer

Cheraw District Regiment led by Col. Abel Kolb, Lt. Col. Lemuel Benton, Maj. Tristram Thomas, with seven (7) known companie,s led by:
- Capt. John Butler
- Capt. Guthridge Lyons
- Capt. Alexander McIntosh
- Capt. Moses Pearson
- Capt. Daniel Sparks
- Capt. William Standard
- Capt. Daniel Williams

Kingstree Regiment detachment led by Col. Archibald McDonald, Maj. John James, with four (4) known companies, led by:
- Capt. James McCauley
- Capt. John Postell
- Capt. Samuel Price
- Capt. Thomas Waties

Berkeley County Regiment detachment led by Col. Richard Richardson, Jr., Lt. Col. Hugh Horry, with five (5) known companies, led by:
- Capt. William Capers
- Capt. John Gamble
- Capt. Robert McCottry
- Capt. William McCottry
- Capt. Gavin Witherspoon

Horry's Light Dragoons led by Lt. Col. Peter Horry, with four (4) known companies, led by:
- Capt. William Allston
- Capt. John Baxter
- Capt. William Black
- Capt. Daniel Conyers

Georgetown District Regiment detachment led by Col. John Ervin, Maj. Alexander Swinton, with one (1) known company, led by:
- Capt. William Gordon

Kershaw Regiment detachment led by Col. John Marshall, Lt. Col. Frederick Kimball, with one (1) known company, led by:
- Maj. James Postell

Lower Craven County Regiment detachment led by Col. Hugh Giles, with unknown number of men

Lt. Col. John Watson Tadwell-Watson - Commanding Officer

Royal Regiment of Artillery with 2 field pieces

Provincials led by Maj. Thomas Barclay with 200 men in the following units

King's American Regiment, Light Infantry Company led by Capt. Thomas Cornwell

DeLancey's Brigade, 3rd Battalion, Capt. Gilbert Willett's Light Infantry Company led by Lt. Edmond Evans

NJ Volunteers, 1st Battalion, Light Infantry Company led by Capt. James Shaw

NJ Volunteers, 2nd Battalion, Light Infantry Company led by Capt. Norman McLeod

NJ Volunteers, 4th Battalion, Light Infantry Company led by Capt. Jacob Van Buskirk

SC Rangers led by Maj. John Harrison, with 80 men, including Capt. Samuel Harrison

Loyalist Militia led by Lt. Col. Henry Richbourg with 150 men

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