throw (troops) into the line

throw the main weight (into)

throw fire (into)

feed troops into the attack

feed troops into battle

pour troops into battle

throw up flak

throw a weapon

throw out a white

throw away the scabbard

throw up fire

throw an arc of strangulation

throw an attack in force

throw someone in the meat grinder

throw the enemy off balance

throw down one's arms

throw on the defensive

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

go into the line

fall into line

forward line of own troops (FLOT)

pull troops out of the line

draw (troops) out of the line

observer-target line (OT line)

scheme trail line (tag line)

go into action

hack (into) a computer (system / network)

incursion into enemy territory

into the wind

putting into service

shake out into (a fighting) formation

spy into

swift entry into hostile territory