Complex sentence: In 1966, counterterror was launched accordingly, with U.S. advisers creating and directing the country's first clandestine paramilitary unit, which was comprised of officers from the security forces and military intelligence.
Split into simpler sentences: In 1966, counterterror was launched accordingly, with U.S. advisers creating and directing the country's first clandestine paramilitary unit. The squad was comprised of officers from the security forces and military intelligence.