:: It was really just a stylistic change. I thought it sounded more formal and encyclopedic the new way, that's all. "Over the course of.." is more appropriate than "during," I think, though that is also a minor quibble. As for "strategy and tactics", just because we don't defend it with examples in the article doesn't mean it didn't happen. As I said, just minor stylistic stuff; I did not mean to offend you or anything.