My wife had a whoops right after high school, and the dad ended up being a total deadbeat. We met when her daughter was 3 and got married within a couple years. We discussed whether or not to wait, and I pointed out that the typical "honeymoon" period with no kids was out of the picture for us, and plus, my half siblings are/were 10, 8 and 6 years older than me and it was kinda rough. I'm sitting there watching cartoons while my high school aged brothers (8 & 10 years older) were out causing so much trouble my mom was on a first name basis with the sheriff (rural, small town Georgia). That huge age gap was kinda rough, we didn't really have any kind of relationship until we were much older, and unfortunately, they both passed before we really had a chance to enjoy that relationship. And I don't have much of a relationship with my sister (6 years older than me).
Any way, we didn't want that big of an age gap, so she got pregnant between when we got engaged and got married. She had a very strict "one kid in diapers at a time." She had a miscarriage on the first attempt at kid number 2 (or 3 counting the step daughter), so my son was 4 years later instead of the planned 3 years.
An 1861-62 repeat or three might do the trick. Including the summer that followed.
Not to get all political, but if another Civil War were to happen, you'd have to really like the analogs we'd be getting.