When Robert Mugabe came to power in 1980 he promised to give white-owned land to the blacks. Yet 20 years on, 4,500 white farmers still owned 70% of the best land.

Now after violent clashes, land invasions and legal challenges, many white farmers have left while others are grimly hanging on. What happened to Mugabe’s promise, and why is land such a contentious issue?

Click on the headings above to find out how the crisis came about.