1-118. A forcible entry operation can be by parachute, air, or amphibious assault. The Army’s parachute assault and air assault forces provide a formidable forcible entry capability. Marine Corps forces specialize in amphibious assault; they also conduct air assaults as part of amphibious operations. Special operations forces (SOF) play an important role in forcible entry; they conduct shaping operations in support of conventional forces while executing their own missions. These capabilities permit JFCs to overwhelm enemy A2 measures and quickly insert combat power. The entry force either resolves the situation or secures a lodgment for delivery of larger forces by aircraft or ships. The three forms of forcible entry produce complementary and reinforcing effects that help JFCs seize the initiative early in a campaign.