In what ways does the Punjab region function as a homeland for Sikhs? How has the Sikh tradition changed as Sikhs have moved outside of that homeland into the wider world?

Clothing is one way that many religious people express their identities. What articles of clothing make a Sikh a Sikh? How do Sikhs differ from one another in terms of how they dress? How is Sikh clothing misunderstood in modern Western countries?