Thirty-one patients with traumatic osteocutaneous defects of the extremities sustained during the war in Croatia and Bosnia and Herzegovina were treated at the Institute of Plastic-Reconstructive and Breast Surgery in Zagreb. Injuries were categorised using the Mangled Extremity Syndrome Index (MESI). The average length of bone defect was 5.9 cm (range 4-12 cm). Patients were divided in two groups according to the time they had reconstruction with a free osteocutaneous flap: group 1, within 6 days after injury, and group 2, after more than 6 days. The mean time to reconstruction in group 2 was 5.2 weeks. Average time to solid bone union was 13.3 weeks in group 1 and 16.6 weeks in group 2. Functional outcome was better in group 1 with fewer complications, smaller number of operations and shorter hospital stay. One-stage reconstruction of osteocutaneous defects with free composite flaps provides reliable treatment solution with good functional outcome.