To curry favour with someone means to try to make them like you, so going to any lengths to make his superiors like him makes sense.
Context: "He went to any lengths and did anything to make himself liked by his superiors and the most sadistic cliques were hard pressed to match his exploits."
Hypothesis: He went to any length to curry favour with his superiors and the most sadistic cliques were hard pressed to match his exploits.
Based on the context, is the hypothesis true, false, or unknown?