Recolored history picture by me.
I feel like if you bumped the saturation up just a tad it would look more vivid. Just a suggestion.
I tried but some colors didn't look right or too shinny. Anyway I think it's because the filters, sometimes it's difficult to make colors look good all together at once. The problem is that the photo is too shinny on the top and too dark at the bottom and because of this when I applied some filters that looked good in some parts in others not, so I tried to make it equal. If that makes sense to you (sorry if my explanation sounds confuse, english it's not my language).
It's called 'Panzerschreck'.