Many, many years ago, when I was a cheery youth, and there was no care in life to weigh me down and no turn of events for me to anticipate except what I dreamed of, I came across an article in the Reader Digest. It was in the late 60s.
In warfare there is a conditional surrender and there is an unconditional surrender of one party to the other. Conditional surrender is usually called a truce. The two warring factions negotiate a ceasefire by each conceding something to the other, with the stronger faction demanding more concessions than offering.