の努力はすべて

all of one's efforts

→ の
phrase Rare #32,441
all of one's efforts The の indicates whose efforts are being discussed; は marks the topic, and すべて means “all.” This phrase is usually followed by a description such as 無駄になる (be wasted).
JA: 彼の努力はすべて報われた。
EN: All of his efforts paid off.

の努力はすべて水の泡になってしまったようだ

It seems that all his efforts have gone to waste.

我々の努力はすべて失敗に終わった

All our efforts ended in failure.

我々の努力はすべてむだだった

All our efforts were in vain.