In 1990 Iraq accused Kuwait of stealing Iraqi petroleum through slant drilling, although some[who?] Iraqi sources indicated Saddam Hussein's decision to attack Kuwait was made only a few months before the actual invasion.[15] Some[who?] feel there were several reasons for the Iraqi move, including Iraq's inability to pay more than US$80 billion that had been borrowed to finance the Iran–Iraq war, and Kuwaiti overproduction of petroleum which kept revenues down for Iraq.