Francis William Bourdillon - The Call

Hark! 'tis the rush of the horses,
The crash of the galloping gun!
The stars are out of their courses;
The hour of Doom has begun.
Leap from thy scabbard, O sword!
Leap! 'Tis the Day of the Lord!
Prate not of peace any longer,
Laughter and idlesse and ease!
Up, every man that is stronger!
Leave but the priest on his knees!
Quick, every hand to the hilt!
Who striketh not—his the guilt!
Call not each man on his brother!
Cry not to Heaven to save!
Thou art the man—not another—
Thou, to off glove and out glaive!
Fight, ye who ne'er fought before!
Fight, ye old fighting-men more!

Francis William Bourdillon

http://www.poemhunter.com/poem/the-call-38/