And yet I know any such attempt would prove fatal to us all.

But this one last attempt to change course abruptly proved too late.

These attempts proved to not be useful for a number of reasons.

"However, our next attempt should prove to be more productive."

Attempts to found a state based upon some 3000 settlers proved difficult.

Although this attempt did not prove to be overly successful.

An earlier attempt at a fighter design proved even less successful.

The first few attempts proved unsuccessful in making a major impact.

Thus the attempt to gain the support of the other unions could prove difficult.

A first operation failed, but the second attempt at the end of 1941 eventually proved successful.