BOGOTA (Reuters) – Colombia will launch a military offensive against illegal armed groups operating in border areas, and it is seeking collaboration from neighbors, Interior Minister Alfonso Prada said on Monday. The South American country has been rocked by almost six decades of internal conflict, leaving at least 450,000 dead. President Gustavo Petro, the first leftist to lead the country, who took power in August, recently restarted peace talks with the National Liberation Army (ELN) guerrilla group, with negotiations in Venezuela, while also looking to implement a 2016 peace deal with now-…