Unlike other games, Warzone starts with zero weapons researched, so Machinegun must be researched before you have any offensive capability at all. Research Facilities are also important.Factories produce additional trucks, which makes building the rest of the base much faster. Many players build a Factory first (or at least second). You can't win a game without having all four of the base structures, but what to build first? This starts them off with two trucks and nothing else. Most players begin a multiplayer game in T1, No Bases.
