“We’re called the Eitam Battalion because that was the name of the second stop overtaken by [the biblical] Israelites in Sinai, on their way out of Egypt,” Savion said. “We are a strategic combat response to any developments on this border. If we see travelers in this region during the holidays, it’s a sign we are succeeding.” THIS IS how the battalion works: The surveillance towers growing out of the dunes feed control centers with advanced radar and visual imagery, and the data is sent to two regional control centers. From there, controllers scanning their screens direct security forces to...