単独 たんどく行動 こうどう主義 しゅぎじゃなかったです
tandokukōdōshugijanakattadesu

Noun
Desu Copula

The polite, past negative form of 単独行動主義

1. Wasn't individualistic.; Wasn't acting alone.

Past/Perfective
Negative
Polite
Casual Register