The following is from a recent Alternet article:
As U.S. and British forces entered Baghdad on April 9, 2003, and the Saddam Hussein regime crumbled, those who had been driven underground by Hussein's rule began to breathe again. From Syria, Britain, Scandinavia and elsewhere, exiled trade union radicals began to make the long journey home.A recent article on Iraqi trade unions written by Giuliana Sgrena can be found here
The first post-Saddam days saw a ferment of labor organizing. A general strike broke out in Basra, after the British troops tried to install a notorious ex-Baath Party leader as mayor. Within a month, the city already had a labor council bringing together many new unions.