You fought nobly, it was just a wrong cause!

They were fighting nobly in defense of the free Constitution of the United States of America.

Die-hard can have a connotation of nobly fighting in a lost cause, but dead-ender connotes foolhardy unwillingness to accept defeat.

Where they nobly fought and nobly died.

They fought nobly and sought no unfair advantage, and their cause was just, the cause of freedom, which you yourself must prize.

The Hmong fought nobly and died.

He fought nobly but the odds against him were too great.

The Princess's guard fought nobly to the end, but they were soon overcome and slain.

When the people fight, they fight nobly.

As for the army, it fought nobly.