establishment of the border relief operation in the first place. While acknowledging that "physical safety is impossible to ensure and constantly at risk" in the border camps, UNBRO nevertheless outlined a broad definition of protection as a goal toward which all its activities would be oriented. This included protection from persecution by any military source, physical or political coercion, criminal victimization, extortion and/or the threat of violent revenge, as well as protection from the negative effects of severe overcrowding, unemployment, limited educational opportunities, etc. UNBRO oversaw the internal security of the camps, although theft and violence plagued camps that were not under the control of the Khmer Rouge. UNBRO coordinated the different organizations providing protection on the border: ICRC was specifically concerned with war crimes, political crimes, and human rights violations, and the Khmer Police took care of traditional police functions within the camps. Between 1980 and 1987 security in the camps was the responsibility of a special Thai Rangers unit known as Task Force 80, however this unit violated human rights so extensively that it was disbanded and replaced by the DPPU (the Displaced Persons Protection Unit, a specially trained paramilitary unit created in 1987 expressly to provide security for the border camps). It was responsible for protecting camp boundaries and preventing bandits from entering the camps. UNBRO also maintained a small team of Protection Officers, whose job it was to monitor the human rights situation in the camps, follow up cases in which people were victimized either deliberately or through poverty, neglect, or "system failure", and encourage people to come to them when they felt their human rights had been abused. UNBRO assumed responsibility for field communications and security coordination for UN and voluntary agency personnel officially working at the border (i.e. working on programs under agreement with UNBRO). Food distribution and health care UNBRO took charge of food distribution to refugees along the border, where previously there had been widespread diversion of supplies to the Thai military and to Khmer resistance units. By the late 1980s UNBRO had standardized its basic weekly food ration so as to provide adequate daily caloric intake established by the World Health Organization. On a per person basis rice, canned or dried fish, one egg and a vegetable were distributed weekly; dried beans, oil, salt, and wheat flour were given once a month. Exact amounts for the weekly and monthly rations in