Palmerston won another general election in July 1865, increasing his majority. The leadership of Palmerston was a great electoral asset to the Liberal Party. He then had to deal with the outbreak of Fenian violence in Ireland. Palmerston ordered the Viceroy of Ireland, Lord Wodehouse, to take measures against this, including a possible suspension of trial-by-jury and a monitoring of Americans travelling to Ireland. He believed that the Fenian agitation was caused by America. On 27 September 1865 he wrote to the Secretary for War: