outline the main line of defense (of the enemy)

main defense area (line) / main defensive position

outline plan

main line of defense (resistance)

main defense (line) area

deployment line; line of deployment (LD); line of departure

main tank/ main fuel tank

main gear box / main rotor transmission

main rotor transmission / main gear box

main-rotor head / main-rotor hub

main-rotor hub / main-rotor head

pass around the enemy's main force

overwhelm an enemy / overwhelm the enemy

main defense forces

main defense zone (defence)

main zone of defense

main fighting line

main line of advance

main battle line

destroy the integrity of the enemy's defense

shallow enemy defense

breach enemy defense

enemy defense breach

interrupt the enemy's line of retreat

shatter the enemy's line

perimeter defense (all-around defense)

beach defense mine / beach-defense mine

back line defense

observer-target line (OT line)

scheme trail line (tag line)

direction of the main blow

main (fighting) force(s)

Main Air Traffic Flow Management Centre (MATFMC)