What Mods or DLC do I need?

Only the free DLC is required to play. These are:
*Art of War     *Zeus

However, it is recommended to get at least the following:
*Apex     *Malden     *Marksman     *Tanks     *Helicopters     *Jets     *Laws of War

Note: If you do not have Apex and Malden, you may be unable to join some unit missions.

These mods are also required for playing:
https://5thbattalion.forumgamers.net/h1-mods
Opens an HTML file with all mods and steam links
If you save this link to your computer, you can load it into the Arma launcher to automatically load the mods.