Special forces emerged in the early 20th century, with a significant growth in the field during the Second World War, when every major army involved in the fighting created formations devoted to special operations behind enemy lines.
11 photos: John Kasich's political career. Ohio Gov. John Kasich speaks at the First in the Nation Republican Leadership Summit on April 18, 2015, in Nashua, New Hampshire. The summit was attended by all the 2016 Republican candidates as well as those eying a run for the nomination.
Governor John Kasich was the last holdout in the fight to keep Donald Trump from the Republican presidential nomination. The Ohio governor ended his presidential bid on 5 May and was the last Republican candidate standing next to Trump. Kasich struggled throughout his campaign to win national recognition.