(to make) an attack in reply to an attack by the enemy

retaliation

the firing of guns from two or more points so that the lines of fire cross

switch, exchange

(an instance, act, of) exchanging things

trade; deal

a place where roads join a motorway etc; (an instance of) the exchange of ideas, methods etc

switch, exchange

the effect of two things on each other

interaction

a response to earlier action or activity; opposition to progress or change; (an instance of) a change in one substance caused by another

response

an act of replying; what is replied; answer

answer

switch, exchange

switch, exchange