On April 14 the pursuing Union Army forces under Colonel Edward Canby caught up with Green. At dawn, Union cavalry attacked and captured the Confederate wagon train, killing and capturing the guard. The Confederates used the low adobe houses in the town as natural fortifications. Canby captured a Confederate supply train which was then approaching Peralta, and then sent John Chivington and Gabriel R. Paul to surround the Confederates to prevent any forces from reaching Green. The adobe walls and irrigation ditches surrounding the town were stronger than Canby was willing to risk an assault on. Learning of the fighting, Sibley led the 4th and 7th Texas Mounted Rifles across the river. The rival armies battered each other in an artillery duel, until a dust storm blew in and allowed the Confederates to withdraw to the west bank of the Rio Grande, leaving behind a town which had been reduced to rubble.
The Confederates reached Los Lunas at 4 a.m., where they rested for a few hours before continuing their retreat. Canby followed with the Union army, harassing the Confederate column with cavalry.
As he attempted to help Colonel Green, General Sibley came directly under fire and retreated across the Rio Grande with bullets splashing behind his horse's heels; it was the only time during the campaign that Sibley was in any personal danger.
Eicher, John H., & Eicher, David J.: Civil War High Commands, Stanford University Press, 2001, ISBN 0-8047-3641-3.
Heyman, Max L., Jr.: Prudent Soldier: A Biography of Major General ERS Canby, 1817-1873, Frontier Military Series III, Glendale, CA: The Arthur H. Clark Co., 1959.
Filson Historical Society Library: MS #118. "Canby, Edward Richard Sprigg, 1819[sic]-1873. Papers, 1837-1873." A\C214 (1 box, 146 items; includes contemporary newspaper accounts regarding General Canby's death and its aftermath).
Military biography of Henry Hopkins Sibley from the Cullum biographies
Frazier, Donald S. Blood & Treasure: Confederate Empire in the Southwest.' Texas A&M University Press; College Station, Texas, 1995. ISBN 0-89096-639-7