So, I went to a JROTC Mill. Ball in highschool, but now I've got a fiance who is in the national guard and they're having a battalion ball. My fiance knows absolutely nothing about what it's supposed to be like, but I'm guessing it will be similar to the high school one, except more formal.

I found this dress on Rent the Runway and fell in love. The reviews say it's not as sparkly or bright as this picture makes it look. It's navy blue sequins on black fabric, so the black absorbs a lot of the light. Also, the colors would probably complement the blue and black of my fiance's Class A uniforms. I just need some more opinions on this dress?

And how should I do my hair? I was thinking of something like the second picture. But a bit softer and smaller. I'm 5'9", 150 pds of muscle, I'm thin with an hourglass shape and 20 yrs old. My hair is about shoulder length and is light brown with natural highlights and lowlights.