jusqu'auboutisme
/ˌʒuːskəʊbuːˈtiːz(ə)m/noun
The policy of carrying on a conflict to the bitter end, or until a conclusive victory has been gained or all one's aims achieved; advocacy of or support for such a policy.
Origin
Early 20th century; earliest use found in War & Peace. From French jusqu'auboutisme, jusqu'au-boutisme from jusqu'au bout + -isme.