@Venocara - some more flags for you, as requested.
Kingdom of La Plata
This takes inspiration from the 'Flag of the Federal League aka Artiga's Flag' (see here:
https://fotw.info/flags/xl_arti.html)
I decided to increase the number of blue/white stripes from three to nine, similar to the thirteen stripes on the OTL USA flag. I picked nine because it looked okay on the flag. If there's a better number based on your alt-history, I can change that.
There are three variants of what's on the red stripe. One is a simple addition of white stripes, just to break up the solid stripe of red. The second adds a crown as a sign of the kingdom. The third has six crowns on it - again, this number could be changed to match something in your alt-history.
1.
View attachment 22258 2.
View attachment 22259 3.
View attachment 22260
Axis Argentina
For this, I decided that the flag could be based on the OTL Argentine flag, but with some sort of sharp-edged symbol, preferably with a tenuous historical / quasi-mystical significance, like the swastika had for the Nazis. So I went with a couple of the symbols from the thousands of geoglyphs in the Atacama desert. The 'stepped rhombus' is very common (see
this link, for example, with two right next to a cross which even looks like the German cross) so I was just going to go with that. Then I found another symbol (
link). It jumped out as something which could take the place of the swastika on a 'war flag' sort of thing, so that's what I did. I still liked the stepped rhombus so I put that it too, but it might be too much, so I've done you a version without it as well. Lastly is a version without that jagged glyph, but the stepped rhombus in the circle instead. Take your pick...
1.
View attachment 22262 2.
View attachment 22263 3.
View attachment 22264
As always, click the thumbnails for the full-size versions. The KoLP ones are 800x450; the AxisA ones are bigger, 1440x900.