De Campo JDC-IO was popularly known in the martial arts community as De campo Uno-Dos-Tres Orihinal. Like most Filipino martial arts, the weapon of choice is the olisi which is made of fibrous rattan sticks. The method is basically long range or Largo mano. Only the last two inches of the olisi or garrote make contact with the target. There are three primary targets: the weapon hand or elbow, the eyes and the knees.
Grandmaster Jose D. Caballero was born on August 7, 1907 in Barrio Ibo,Toledo City, west of Cebu Province. In his early youth he used to go from barrio to barrio to watch Eskrima exhibitions during the fiesta celebrations. These demonstrations, mostly pre-arranged sparring called DeCadena, were more of a cultural presentation than a display of real fighting which he was doggedly searching for. From his observations of these exhibitions, he later modified the moves
He never relished the recognition as Grandmaster in the book The Masters of Arnis, Kali and Eskrima by the late Edgar G. Sulite. In the deference to the spirit of the founder of Lameco Eskrima International, he cannot accept this title not for lack of credentials but due to the apparent absence of standardized and rigid criteria in the selection of the title Grandmaster. As a college instructor, he prefers to be called simply Teacher Eric Olavides. The heir apparent of GM Jose D. Caballero's De Campo 1-2-3 Orihinal (now renamed simply as De Campo JDC-IO) has always maintained that he is not a Grandmaster of Eskrima.