The convoy to Baghdad is being organised by former US marine Kenneth Nichols, who served in the first Gulf war and won a combat medal but has now become a vociferous opponent of another Gulf conflict.
British protesters are also heading for the country in advance of any Anglo-American bombing.
Nichols, 33, aims to gather scores of volunteers together in London and lead the convoy on 10 January. It will drive across Europe, holding rallies in various capital cities and collecting other human-shield demonstrators along the way. It plans to travel via Amsterdam, Brussels, Paris, Zurich, Milan, Sarajevo, Istanbul and Syria to Baghdad.
He is hoping that the convoy will arrive in the Iraqi capital around 24 January, three days before President George W Bush is to make his decision on whether Iraq has complied with the UN weapons inspections, potentially triggering a US-led invasion.
Nichols is willing to put his own life on the line to stop a war. 'In going to Iraq I understand that I will likely not survive a US invasion,' he said.
Once in Iraq, members of the convoy will identify infrastructure targets for bombing, such as power stations, key bridges and roads, and deploy themselves as human shields in the glare of the international media.
'I don't think anyone will be happy about bombing somewhere they see being protected by North Americans or Europeans,' he said.
In the 1991 conflict, Nichols was serving in the 2nd Battalion of the Marine Corps. He was an infantryman on the road to Basra, where heavy Allied bombing killed hundreds of retreating Iraqi soldiers. He left the Marine Corps a year later.
His experience of war left him disillusioned with American foreign policy, and he is now a vociferous opponent of US foreign interventions. 'Part of the reason I want to go back is to apologise to the Iraqi people for what I was doing there the first time I was in their country,' he said.
Part-time law student Jo Wilding, 28, is one Briton who is heading for the region. She expects to fly to Baghdad on 10 January and then go to the southern city of Basra. 'There is something I can do there just by being a foreigner,' she said. 'If something does start when we are there, we will be able to document it.'
