The US Secretary of State Condoleezza Rice has promised to write off $391m (£200m) in debt Liberia owes to the US.
Condoleezza Rice promises debt relief to Liberia
Speaking at a World Bank conference, she told Liberia's President Ellen Johnson Sirleaf: "We have every intention of helping you succeed."
The World Bank's Paul Wolfowitz opened the conference by saying that Liberia's $3.7bn of debt was unsustainable for a country of three million people.
President Sirleaf warned that Liberia was "not out of the woods yet".
Ms Rice also announced that President Bush had asked Congress to provide more than $200m in additional aid to Liberia over the next year.
A conflict between 1989 and 2003 devastated the West African state and left more than 200,000 dead.