HOHENFELS, Germany — An array of new drone-busting technology went for a soldierly spin this week at the Army’s expansive training grounds in Bavaria, where units are looking for a tactical edge on a transforming modern battlefield. Troops from the Vilseck-based 2nd Cavalry Regiment took part in a new initiative called Project Flytrap at the Joint Multinational Readiness Center, using vehicle-mounted and wearable systems designed to detect, track and jam hostile drones. The initiative is part of an effort to identify which tools best meet evolving combat demands. Project Flytrap, which began its first stage earlier this month, is a...