In 1599, Robert Devereux, 2nd Earl of Essex arrived in Ireland with over 17,000 English troops. He took the advice of the Irish privy council, to settle the south of the country with garrisons before making an attempt on Ulster, but this dissipated his forces and he ended up suffering numerous setbacks on a desultory progress through south Leinster and Munster. He spent almost all of his time in Ireland awaiting transport that he had been promised before setting out, it being the only effective way of reaching his stated objective of Lough Foyle; however, a lack of administrative efficiency in England caused his plans to go awry and the requisite pack animals and ships were never sent. Those expeditions he did organise were disastrous, especially an expedition crossing the Curlew mountains to Sligo, which was mauled by O'Donnell at the Battle of Curlew Pass. Thousands of his troops, shut up in unsanitary garrisons, died of diseases such as typhoid and dysentery.