The different factions:
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(New in 0.8)
0 - The Enclave: Armed with energy weapons and heavy armors. Can call in Sentry Bots.
1 - Brotherhood of Steel: Armed with laser rifles, heavy melee weapons and power armors. Can call in Sentry Bots.
2 - US Army: Armed with ordinary ballistic weapons, explosives and light armors. Can call in Sentry Bots.
2 - US Army (OA): A mixture between foot soldiers and heavy man-tanks in power armors. Can call in Sentry Bots.
3 - The Outcast: Armed with less advanced weapons that the brotherhood but better than the army. Can call in Sentry Bots.
4 - Chinese Army: Armed with Chinese only manufactured weapons.
4 - Chinese Army (OA): A mixture between Crimson Dragons and standard Red Army foot soldiers. Can call in Chimera Tanks.

Oder auch kurz:

set J3XVertibirdSoldierType to x

0 for Enclave.
1 for Brotherhood of Steel.
2 for Normal soldiers.
3 for Brotherhood Outcast.
4 for Chinese Soldiers.