Singapore, Jan. 20 -- Private Muhammad Hadi Abdul Hariry, a self-described introvert who spent the past six years in New Zealand after his family migrated there, had worries about fitting in with his camp mates when he enlisted for national service in Singapore.

Staying in camp during basic military training (BMT) meant he had to sleep in the same room as strangers. But he soon became friends with them as they all learnt about the importance of teamwork, said the 18-year-old Singaporean.

Having to serve NS meant he had to overcome his shy personality, said Pte Hadi, now a supply assistant for general equipment at the Army Logistics Training Institute.

"I had to interact with new people, which to me was quite a big challenge. But I kne...