Despite equivocal results in Cambodia, less than a year later the Americans pressed the South Vietnamese to launch a second cross-border operation, this time into Laos. Although the United States would provide air, artillery, and logistical support, Army advisers would not accompany South Vietnamese forces. The Americans' enthusiasm for the operation exceeded that of their allies. Anticipating high casualties, South Vietnam's leaders were reluctant to involve their army once more in extended operations outside their country.