Complex sentence: Surrounded by barbed wire fences in clusters of hatched huts were 2,146 POWs: 1,527 Americans, 329 British, 133 Australians, 89 Dutch, 30 Norwegians, 22 Poles, 16 Italians, and 1 Nicaraguan.
Split into simpler sentences: Surrounded by barbed wire fences in clusters of hatched huts were 2,146 POWs incarcerated. Prisoners were composed of 1,527 Americans, 329 British, 133 Australians, 89 Dutch, 30 Norwegians, 22 Poles, 16 Italians, and 1 Nicaraguan.