Twenty-six-year-old U.S. Army infantry veteran Thomas Latham is one of countless young people on TikTok, but he’s used it for a different purpose than most: recruiting veterans to staff secret U.S. military bases in Israel. “Being a contractor is lit, in America this view would be $4,000 a month,” says the superimposed text on a TikTok post by Latham. His phone camera pans across the view from a high-rise in the Israeli town of Beersheba. In 2017, the Israeli military celebrated the construction of a U.S. military base in the town — a presence the Pentagon tried to downplay. The...