Since both Alm and Celica are incredibly overpowered compared to your units, this is not a theme you may be hearing too often. Regardless, the original is basically the theme from Fe1 but with a little follow-up. I expanded on that follow-up. This is the results.
This is an arrangement project of the game Fire Emblem ~ Gaiden, released in Japan for the Famicom Disk System in 1992. The original tracks are made using the hardware limitations of the original device, limiting the compositions to chiptune sounds. Thus, I made it my mission to upgrade the sound and arrangement of the tracks to what I call the "enhanced GBA standard". This is made using the instruments found in the Game Boy Advance iterations of the same franchise, without restricting myself to any hardware limitations. This results in a rich sound which still hopefully sounds nostalgic to people like myself who grew up playing these games on the GBA.
Do you want to use this cover in your own projects? Feel free to do so without restrictions. However, I'd find it very interesting to see your finished work, so please message me about it!