The Model Barrio program, a category in the Tactical Inspection, began after the declaration of Martial Law -- in School Year 1972 - 73.

Each ROTC unit was instructed to undertake what was described as a "massive conduct of civic action activities in a selected under developed barrio". The ROTCU's mission was to "improve and develop it into a model barrio."

As described in a letter from HQ HDU 4ID, dated 03 DEC 1973, to all ROTCUs under its command (note, this is a completely unedited reproduction):

"The role of the ROTC cadets/cadettes is that of a motivator, a change agent to all segments of the barrio. The men, women, and children should be motivated and integrated in the development of the local government and should likwise be sought on the principle that this activity adequately implements the government's efforts to reform society under the New Society ushered in by Presidential Proclaimation No. 1081"

ROTC commandants, after due consultation with school officials, were authorized to make use of ROTC cadets/cadettes for this activity -- which was mounted in addition to regular training. Commandants were given the prerogative to coordinate with various government and non-government agencies in the development of the chosen barrio. By design, the assistance provided promoted the concept of self-help.

The first barrio assigned to the Ateneo was in Catalunan Pequeno. The unit busied itself with beautification activities and the setting up of sanitation facilities. Free dental services and medicine were provided to the residents of the barrio.