Armed forces

Malaysia consist of 3 main races.Chinese,Indians and Malays.Yes,these 3 races are citizens of the country.One of the things we have in common is that,we are known as Malaysians.However,when we question about serving the country,most of the armies are technically malays.Why dont other races serve as well when it's their own country too? Well,I've finally understood the whole concept of the Nasional Service now..