In January 2003 a group of anti-war activists joined O'Keefe in London and set out to carry out the plan. On 25 January 2003 a group of 50 volunteers left London and headed for Baghdad with the intention of acting as human shields. The convoy travelled through Europe and Turkey by bus and picked up more volunteers along the way, totalling roughly 75 people. It has been estimated that 200 to 500 people eventually made their way into Iraq before the invasion in March.