Cow Wars

Parashuram Uncle Vishvamitra War with Vashista War for Cow

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Parashuram wiped the Kshatriyas as they harassed Cows

He has been a Guru to

1. Bhishma Previous Birth Stealing Cow form Vashishta 
2. Dronacharya with Drupada for Cow Donation 
3. Karna Cursed for accidently killing Cow 

In Future Parashuram disciple Kalki Bhagawan will wage war for Cow Protection