I’ve watched the 1st, have the others recorded/set to record. I thought the 1st was very good. Learned some stuff. Like Washington was ****ed at the British. He used to be an Officer in their Army but they wouldn’t promote him because he was a Colonist. He gets his revenge.
I believe he was a Militia officer, not an officer in the British Army (NEVER the "Royal Army"!). He felt he deserved a commission as a regular, and felt they turned him down due to his being a colonial.
As Geezer said, in this era (and for the next 100 years), British officers bought their commissions. Burns never said whether Washington tried to buy one, or whether he wanted one of the few opportunities for a direct commission.
The practice of buying commissions in the Army dates back to the British civil wars. It was felt that officers would be less likely to support "the other side" if they had to put a financial stake into their career. It was also felt that a high purchase price kept the "wrong sort" from officer rank. There was no pension for officers; when you decided to retire, you had to hope that your commission had increased in value. For the most part, the officers came from the upper class, anyway.
The price depended on the "quality" of the regiment (you paid more for more fashionable-regiments) and the upcoming orders for the unit (being sent overseas, to the "fever isles"). Existing officers would then be much more interested in selling out and you might catch a bargain.
Did it work? Well, for the most part. Napoleon was beat by officers who had bought their commissions (up to and including the Duke of Wellington), though Boney's comment about the British army was "Lions led by donkeys."
You couldn't buy a commission in just any unit, though...Royal Artillery and the Engineers promoted by ability. The Royal Navy, also, didn't have purchased commissions.
It ended about 1870...and led to the immortal song, "I Am the Very Model of a Modern Major General...."
Ron Wanttaja