Here is all the war info you will need to know.

Lunar Empire
Leader-Princess Luna and General Derpy Hooves
Allies-Griffon Flock,Peace Corps
Enemies-Solar Empire,Sombratic Empire

Stellar Alignment
Leader-Twilight Sparkle and General Spike
Allies-Solar Empire,Crystal Empire,Peace Corps
Enemies-Order of Chaos

Sombratic Empire
Leader-King Sombra alongside Starlight Glimmer,Sunset Shimmer,and Trixie
Allies-Peace Corps
Enemies-Crystal Empire

Changeling Swarm
Leader-Queen Chrysalis
Allies-Peace Corps,Order of Chaos
Enemies-Crystal Empire

Order of Chaos
Leader-Discord,Screwball,Fluffepuff (what?)
Allies-Peace Corps,Changeling Swarm
Enemies-Sombratic Empire

Peace Corps
Leader-Fluttershy
Allies-EVERYPONY
Enemies-No one

Griffon Flock
Leader-Unknown
Allies-Lunar Republic
Enemies-None at the moment

https://couvecant.files.wordpress.com/2013/04/griffonshield1-copy.jpg

Crystal Empire
Leader-Princess Cadence and Shing Armor
Allies-Solar Empire and Stellar Alignment
Enemies-Sombratic Empire and Changeling Swarm