What is sikh migration?

Some articles on sikh migration, sikh:

Sikh Diaspora - Sikh Identity Today
... Whilst the rate of Sikh migration from the Punjab has remained high, traditional patterns of Sikh migration, that favored English speaking countries ... that as a consequence of the 'fact' that Sikh migration to the UK had "become virtually impossible since the late 1970s", Sikh migration patterns altered ... Italy has now emerged as a fast-growing area for Sikh migration, with Reggio Emilia and the Vicenza province being areas of significant Sikh population clusters ...