Listen to katha by Giani Thakur Singh Ji called Sant Da Jeevan. Giani Ji discusses the last moments before Sant Ji went onto the battlefield with around 40 Singhz.
http://www.gurmatveechar.org/audio/katha/0...t.Da.Jeevan.mp3
At 20:06 Giani Ji starts talking about Sant Jarnail Singh Ji.