According to Maj.
Gen. Nathaniel P. Banks' Report of the Battle, 
The enemy began to reconnoiter the new position we had assumed at 11 o'clock on the morning of the 9th, and as early as 1 or 2 o'clock opened a sharp fire of skirmishers, which was kept up at intervals during the afternoon.

At 5 p.m., the Confederate forces launched their attack, charging the entire Union line.
Walker's and Major's attack on the Union right had little success — the Union right, for the most part, held its ground.
However, overall, this initial charge by the Confederates was highly successful and many of the positions down the Union left and center were overrun by Churchill's and Parson's forces and the Union positions were forced backwards.
However, the Union side succeeded in halting the advance and regained the left and center ground, before driving the Confederates from the field.
The fiercely fought battle lasted about two hours.
Losses were heavy on both sides.
The 32nd Iowa Infantry sustained especially heavy casualties, as it was cut off from the rest of the Union forces during the battle.

Confederate Brig.
Gen. Hamilton P. Bee, with two regiments in columns of four rode swiftly down the Pleasant Hill road toward the enemy lines.
The Confederate forces were suddenly attacked at close range by Federals concealed behind a fence.
 Winters describes the scene, accordingly: "Men toppled from their saddles, wounded horses screamed in anguish, and for a moment pandemonium reigned.
Bee's men took temporary shelter . . .
in a series of small ravines studded with young pines until they recovered from the shock of the unexpected attack.
Bee rallied his men but in the process had two horses shot from under him.
Colonel [Xavier B.] Debray was injured when he fell from the saddle of his dead horse. . . .
Debray was able to withdraw his men safely to the rear leaving, however, about a third of them killed or wounded on the front."

Banks and his army began their retreat from Pleasant Hill at 1 a.m. on the morning of the April 10 (just a few hours after the battle had ended).
According to Maj. Gen. Nathaniel P. Banks' Report of the Battle, 
The enemy began to reconnoiter the new position we had assumed at 11 o'clock on the morning of the 9th, and as early as 1 or 2 o'clock opened a sharp fire of skirmishers, which was kept up at intervals during the afternoon.
At 5 p.m., the Confederate forces launched their attack, charging the entire Union line. Walker's and Major's attack on the Union right had little success — the Union right, for the most part, held its ground. However, overall, this initial charge by the Confederates was highly successful and many of the positions down the Union left and center were overrun by Churchill's and Parson's forces and the Union positions were forced backwards. However, the Union side succeeded in halting the advance and regained the left and center ground, before driving the Confederates from the field. The fiercely fought battle lasted about two hours. Losses were heavy on both sides. The 32nd Iowa Infantry sustained especially heavy casualties, as it was cut off from the rest of the Union forces during the battle.
Confederate Brig. Gen. Hamilton P. Bee, with two regiments in columns of four rode swiftly down the Pleasant Hill road toward the enemy lines. The Confederate forces were suddenly attacked at close range by Federals concealed behind a fence.  Winters describes the scene, accordingly: "Men toppled from their saddles, wounded horses screamed in anguish, and for a moment pandemonium reigned. Bee's men took temporary shelter . . . in a series of small ravines studded with young pines until they recovered from the shock of the unexpected attack. Bee rallied his men but in the process had two horses shot from under him. Colonel [Xavier B.] Debray was injured when he fell from the saddle of his dead horse. . . . Debray was able to withdraw his men safely to the rear leaving, however, about a third of them killed or wounded on the front."
Banks and his army began their retreat from Pleasant Hill at 1 a.m. on the morning of the April 10 (just a few hours after the battle had ended).
Battle of Pleasant Hill