once more unto the breach

The phrase "once more unto the breach" is a line from William Shakespeare's play Henry V, specifically from the speech given by King Henry V to rally his troops before a battle. It means that despite having faced challenges or dangers in the past, the speaker is calling upon his comrades to face them again with renewed determination and courage. It signifies a willingness to bravely confront a difficult or dangerous situation, urging others to join in the struggle.