入って行った

went in

→ 入る
phrase Uncommon #15,804
went in Describes entering and moving inward or away from the speaker. With abstract destinations, it can mean moving into or becoming part of something.
JA: 彼女は部屋に入って行った。
EN: She went into the room.

彼女たちは一人ずつ学校に入って行った

They entered the school one by one.

— Article 15 (2019)

彼は銀行に入って行った。

He went into the bank.

おい今黒藤のところへ室戸が入って行ったぞ

Hey, Muroto just went into Kurofuji’s place.

— Sanjuro (1962)

燃える家の中へ入って行ったとは勇敢でしたね。

It was brave of you to go into the burning house.