The Vishva Hindu Parishad (VHP) will roll out on Friday a 10-day nationwide campaign to bridge the caste-divide in Hindu society and spread the message that "all Hindus are one". During the 'Samrasta Abhiyan', which will conclude on January 23, the saffron outfit will organise various programmes including a 'Sah Bhoj' -- an event for people belonging to upper and lower castes to join and dine together.