Falling in Love In A Battle? Any manga comes to mind?

Special A

A few more details would have helped." Falling in Love In A Battle" I guess you mean mostly shojo manga... 😁

Basara - they fall in love during a war/revolution, not knowing they are mortal enemies

In most of these next mangas the characters fall in love during a fight.
Hot Blooded Woman – she falls in love with him after he defeats her in combat
Vanilla Ice – she falls in love with the guy when she sees what a good fighter he is
Negative Happy Chain Saw Edge
The Kidnapping of Minja Jo's Boyfriend
Do You Want to Try?
Tokyo Crazy Paradise - by the same mangaka who wrote Skip Beat!

Zettai Heiwa Daisakusen – the characters are prince/princess of enemy countries that have a political marriage even though they can’t stand each other.

😃

Fate/Stay Night
Ranma 1/2 this one is straight silly with it though
Shijou Saikyou no Deshi Kenichi
Mahou Sensei Negima! the really good battles dont begin until later on though
Highschool of the Dead it fits... kinda
Mahou Tsukai Kurohime
Onihime VS
Project ARMS not sure if this fits but the more the merrier!
Ping
Radiata Stories - Epic of Jack not so sure about this one
Seikon no Quasar
mai-otome
mai-hime
just to name a few 😀

Superior?

Don't only look straight, look also to the sides, usually the essential isn't in front of you, but beside you.
-7

Quote from JAm1

Superior?

Seconded

The Prince's Cactus They verbally fight, so... I guess this counts?
Kaichou wa Maid-sama She hates him and the relationship is sorta/kinda like the one in Special A, but not really. Mostly verbal fights again.

I second these two
Zettai Heiwa Daisakusen
Basara