Birmingham historian Dr. Carl Chinn noted that during the Second World War the boundary between Handsworth and the outlying suburb of Handsworth Wood marked the line between being safe and unsafe from bombing, with Handsworth Wood being an official evacuation zone, despite being at least ten miles away from any countryside that might now qualify as "green belt" land, and being on the periphery of many "high risk" areas. During the Second World War, West Indians had arrived as part of the colonial war effort, where they worked in Birmingham munitions factories. In the post-war period, a rebuilding programme required much unskilled labour and Birmingham's industrial base expanded, significantly increasing the demand for both skilled and unskilled workers. During this time, there was direct recruitment for workers from the Caribbean and the area became a centre for Birmingham's Afro-Caribbean community.