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.
Is the Ohio governor a conservative or an ideologue -- and will it even matter in November? More than any of the other Republican governors elected with him in 2010, Ohioâs John Kasich remains a mystery even to those who follow state politics closely. Which Kasich is the real one?