Italy, allied with Prussia against Austria in hope of "redeeming" Italian-speaking Austrian territory, had declared war four days before and invaded Venetia. Outnumbered Austrian forces met the incursion near the small town of Custoza, southwest of Verona, and inflicted a heavy defeat, forcing the Italians back across the border. The Italians lost more than eight thousand men, killed, wounded, and captured. (By John Osborne)
Source Citation
"German-Italian War," The American Cyclopedia and Register of Important Events of the Year 1866 (New York: D. Appleton and Company, 1873), 360-362.