French intervention in Italy had created an invasion scare and Palmerston established a Royal Commission on the Defence of the United Kingdom which reported in 1860. It recommended a huge programme of fortifications to protect the Royal Navy Dockyards and ports, which Palmerston vigorously supported. Objecting to the enormous expense, Gladstone repeatedly threatened to resign as Chancellor when the proposals were accepted. Palmerston said that he had received so many resignation letters from Gladstone that he feared that they would set fire to the chimney.