Meanings

to have a discussion

economic war

to fight to the last (death)

in times of war

to open hostilities

match between Waseda University and Keio University (esp. baseball)

antitank gun

to win every battle (that is fought)

round-robin tournament

Waseda-Meiji (baseball) game

battlefield

(baseball) game between Waseda and Tokyo universities

to challenge (a person) to a fight

cold war

rollback operation

Rikkyo-Meiji (baseball) game

game or series of games between the first and second place teams

opening game

closely contested constituency

chemical warfare