YOU SAID:
Trebuchets are the superior siege engine.
INTO JAPANESE
Trebuchetsは優れた包囲エンジンです。
BACK INTO ENGLISH
Trebuchets is an excellent siege engine.
INTO JAPANESE
Trebuchetsは優れた攻城エンジンです。
BACK INTO ENGLISH
Trebuchets is an excellent siege engine.
That didn't even make that much sense in English.