Chad's President Idriss Deby has acknowledged he wants to use oil revenues to pay for weapons to use against rebels.
Security was tight around President Idriss Deby
Last week, Chad repelled a rebel attack on the capital, N'Djamena.
The World Bank has frozen Chad's oil revenue account, saying President Deby has breached an agreement to reserve some of the money for development.
In an interview with a French newspaper, Mr Deby asked which country would not buy arms to defend itself.
"Why shouldn't Chad be allowed? We are going to buy weapons. We're going to do it openly. In the next two days these arms will arrive," Mr Deby told the French daily Le Figaro newspaper.
Mr Deby also said the international community should have taken a stronger line against Sudan, which he blames for the attack on the capital by the United Front for Change rebel group.
"The UN Security Council and African Union should condemn firmly the Sudanese aggression against Chad."
In another interview with Le Monde newspaper, Mr Deby blamed the World Bank for his country's economic problems.
"The sum we want to use [for general government spending] is smaller than what the World Bank spends each day on communication," he said.
"The only one responsible for our economic difficulties is the World Bank. The crisis was provoked by the World Bank turning off the tap to our finances."
The World Bank froze Chad's oil payments after the government reneged on an agreement to ensure oil revenues were not stolen were altered last year.
Mr Deby came to power in 1990, after ousting the former President Hissene Habre in a coup.