Possible Clues:

• Keep on keeping on
• Soldier on right cut, breaking sword, losing tip
• Remain by ascetic
• Salesman's turned up, very difficult to continue
• Go on in spite of setbacks
• Keep going south, always in custody of Nancy's dad
• Soldier on exercises with regiment is dreadful
• Continue exercise with runs getting tough
• Don't give up, for each difficult
• Go on about trailing first lady's representative around