BOGOTA—Colombia’s energy sector, the main driver of its economy, is limping away from “Black October,” a term coined by Marxist rebels who set forth on a month-long blitzkrieg, attacking oil pipelines, coal trains, electricity plants and transmission towers in a show of strength during peace talks with the government. There were roughly two dozen attacks during October on high-profile targets like oil pipelines, according to security analysts and companies. That was more than double the number of attacks in September and by far the highest for any month this year, according to analysts. The Colombian government usually comes out with a count months later. Colombia’s army declined to comment. Most of the attacks are believed to be the work of the country’s main guerrilla force, the Revolutionary Armed Forces of Colombia, or FARC. The attacks add to doubts about the rebels’ sincerity in reaching a peace agreement with the […]