Complex sentence: Although over 100,000 Italian POW were sent to South Africa, only a handful decided to stay, and during their capture, they were given the opportunity to build chapels, churches, dams, and many more structures.
Split into simpler sentences: Although over 100,000 Italian POW were sent to South Africa, only a handful decided to stay. During their capture, they were given the opportunity to build chapels, churches, dams, and many more structures.