VirginBorn

To keep her virginity undisturbed, the sun-god arranged to give her a child that came from her ear, and therefore the child was known as Karṇa.

http://vaniquotes.org/wiki/Category:Karna
http://freethoughtnation.com/component/content/article/372-the-virgin-born-sun-of-god.html

Caste

Marriage formed basis of Caste

Kunti broke this to unite with sun to produce karna from ear

http://0ug0.blogspot.com/search/label/VirginBorn

in the similar way as earth originated

http://harekrishnainfo.blogspot.com/search/label/EarthofEar

Karna then choose Parashurma who born as brahmin did the work of kshatriya as his Master

Later questioned by duryodana to suggest replacement of commander bhishma

He suggested drona who born as brahmin did the work of kshatriya as his commander

Yudhisthira

1. https://en.wikipedia.org/wiki/Yudhisthira#Test_of_patience_in_Hell
2. https://en.wikipedia.org/wiki/Yudhisthira#Yudhishthira.27s_curse

https://www.speakingtree.in/allslides/when-yudhishthir-cursed-his-own-mother-kunti/173386

Vyuha

Karna arranged his army in Makara vyuha. Looking at the formation of the Kauravas army, Yudhisthira noted their vyuha and the shining chariot of Karna. Arjuna chose the crescent formation.