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So I have a similar routine (push, pull, leg/ab), but different workouts and set/rep combination

One of the cool things about the present is we no longer have to guess which exercises are most effective at stimulating muscle development.

By using a technique called Electromyography (EMG), which measures the electrical activity of muscles during exercise, we have a good proxy for how much of the muscle is being used.

Edit: so originally I had some data here that I had from I saved in my notes from years ago to refer back to, back when EMG analysis was new and articles about it not common.

Now that’s not the case, and I can’t find that specific source, so deleting that, but ultimately I think my point of using EMG analysis of best exercises to target your muscle groups as opposed to just guessing still stands, and you can review the many articles online to determine which are best for yourself.

Not military but my understanding is:

Commissioned officer: starts at second lieutenant, can go all the way to lieutenant general, have to go to specialized school (like West Point) to be eligible. Receive their “commission”/assignment directly from president. As the other commenter mentioned, BG is fairly high up.

Each service can have slightly different names for certain positions. And yes they split CO positions into three types, company, field and general, BG is the lowest “general officer”. As to how, you could always ask, but some combination of seniority/achievements. He almost certainly serviced in combat in Afghanistan/iraq as a field officer given the timelines.

Non-commissioned officer: these people joined as rank and file, and got promoted to oversee/command people below them, but didn’t go to specialized school, and can’t rise above sergeant major. So you could have a guy with 20 years of experience commanded by a brand new second lieutenant.

Rank and file: privates and the like.