1.
fierce battle, intense combat
A violent or intense military battle.
その島では激戦が繰り広げられた。
A fierce battle was waged on that island.
激戦の末、多くの兵士が命を落とした。
After fierce fighting, many soldiers lost their lives.
この地域は第二次世界大戦の激戦地として知られている。
This area is known as a fierce battleground of World War II.
2.
close contest, fierce competition
A highly competitive contest where the outcome is uncertain, used for elections, sports, business competition, and other non-military contexts.
決勝は激戦だった。
The final was a fierce contest.
選挙は激戦が予想されている。
A close contest is expected in the election.
激戦の末、ホームチームが逆転勝利を収めた。
After a fierce contest, the home team pulled off a come-from-behind victory.
USAGE:
The figurative sense (close competition) is very common in modern Japanese, especially in news reporting about elections and sports. The expression 激戦区 (hotly contested district) is a standard political term.
COMMON COLLOCATIONS:
- 激戦地: battlefield, battleground
- 激戦区: closely contested district (in elections)
- 激戦の末: after a fierce battle/contest
- 激戦を繰り広げる: to wage a fierce battle