Complex sentence: Louis VII led an ineffective war against Henry for having married without the authorization of his suzerain; the result was a humiliation for the enemies of Henry and Eleanor, who saw their troops routed, their lands ravaged, and their property stolen.
Split into simpler sentences: Louis VII led an ineffective war against Henry for having married without the authorization of his suzerain. The result was a humiliation for the enemies of Henry and Eleanor, who saw their troops routed, their lands ravaged, and their property stolen.