Bhai Mehtab was a fearless son of Guru Gobind Singh. When the Hari Mandir Sahib was taken over by a crude Moghul ruler, it turned in to a house of sense gratification. Bhai Mehtab couldn't stand it when he heard this news. He told the people in the village, "Start an Akhand Poth, I will either die or bring back this rulers head by the time it is finished." And to Bhai Mehtab galloped on horse to Amritsar.....
The wise and fearless master who came to be known as 'Buddha', ventured in to the woods where a ferocious murderer lived. This murderer found he could not scare this calm master. Buddha politely gave him a lesson which impressed the murderer so much he changed his ways. He never stole or killed again, instead he began listening to divine teachings and giving to charity.
After Guru Gobind Singh's time, during the time of Maharaja Ranjit Singh, there was a purely devoted fearless Khalsa named Akali Phula Singh. After taking a hukam from the Guru he wouldn't delay his battle plan to attack at dawn. He was the only one to charge in to battle against the Afghan army at first. He fought bravely without fear of death. He said, "The Khalsa of Guru Gobind Singh can do anything."
Not long ago in Amritsar, there was a group of people called the 'Nirankaaris'. They did great insults to the Guru like putting a man above the Guru that they said is the living Guru. Some Khalsa marched in protest to them carrying this man in a Palki at Baisakhi. The Nirankaaris shot at these men and many of them died. They died fearlessly and they never forgot the Guru.
One time Guru Gobind Singh told one of his soldiers to climb up a huge tree that was near by. He told him to go up there and look for a Pipal tree. When the Pipal tree was found Guru ji told him that one day the Pipal tree will be even higher that the huge tree above it. "When it gets that high than the Khalsa will flourish in this world." The Pipal tree grows very slow and as it takes over the other tree surely the Khalsa will spread in the kindest of spirits.
A king with his army visited Guru Gobind Singh ji. The king obviously thought his army was superior to the Guru's so the Guru decided to teach him a kind lesson. Guru ji asked his Sikhs to use themselves as targets to test a new gun he had received. Two Sikhs wanted so much to give their lives for the Guru they fought over who would be the target. The proud king was greatly humbled.