To be jumbled together or intermixed chaotically; used when many people or things become mixed up and order is lost.
観客が入り乱れてスタジアムは混沌とした雰囲気になった。
The spectators jumbled together and the stadium took on a chaotic atmosphere.
意見が入り乱れて議論は収拾がつかなくなった。
Opinions were all mixed together and the debate became unruly.
戦場では味方と敵が入り乱れていることが多い描写がされる。
Battlefield scenes are often depicted with allies and enemies jumbled together.