Complex sentence: Phase 2 lasts for at 8 to 10 months and is designed to equip recruits with the skills and knowledge required to act as a Marine in a Commando Unit, in addition to preparing them for the rigours of the Reserve Forces Commando Course.
Split into simpler sentences: Phase 2 lasts for at eight to ten months and is designed to equip recruits with the skills and knowledge required to act as a Marine in a Commando Unit. In addition to preparing them for the rigours of the Reserve Forces Commando Course.