Answer:
waged wars of conquest.
Step-by-step explanation:
This question addresses the topic of parallelism. Parallelism refers to the practice of similar phrases or clauses within a sentence having the same grammatical structure. This is an important thing to keep in mind if we want our texts to be easy to understand and process. In this example, the series of phrases presented should all be in the simple past in order to ensure parallelism:
...practiced slavery...
...denied political rights to women...
...waged wars of conquest.