The assignment was completed with additional staff.
Extra employees helped me reach the deadline in time.
人海戦術で期限内に仕上げました
Finished within the deadline with human tactics
私は多くの人材で仕事を成し遂げました。
I accomplished the job with lots of manpower.
割り当ては追加スタッフで完了しました。
The assignment was completed with additional staff.
余分な従業員が期限内に間に合うように助けてくれました。
Extra employees helped me reach the deadline in time.
We threw a lot of people at the project to get it done on time.
We threw a lot of people at the project to get it done on time.
We allocated a large number of people to the project and completed it by the deadline.
We managed to finish it on time by putting a lot of manpower into it.
It was completed on time thanks to a massive team effort.
「人海戦術」は日本語ではよく使われますが、英語には完全に一致する自然な表現はありません。
そのため英語では、
a lot of manpower
多くの人手
a large number of people
大勢の人員
a massive team effort
大規模なチームの努力
などを使って表現するのが一般的です。