I've already received some feedback from players on the topic of an overly difficult zombie apocalypse, so I feel it's necessary to make some clarifications on this topic. This scenario is really difficult and requires more effort from the player than other scenarios. Most likely you will lose the first game, this is inevitable, few people can easily and quickly adapt to a new type of battle, look at the zombie spawn locations, their spawn time is randomly up to 4 months, but the first 2 weeks of the game, everyone except Thailand has time to prepare, respawn locations are almost always the same and are based on the first cases of covid at the beginning of 2020. In fact, the game has a lot of great ideas and features that are rarely used by players in practice, due to the fact that the game in singleplayer is quite simple due to automation capabilities, most players usually don't pay attention to the possibility of destroying bridges in front of the enemy or to the available nuclear missiles, which, if manually guided, could make a very significant contribution to both defense and offensive. The zombie apocalypse can be stopped and defeated, but for this you need to be able to retreat when the battle has no prospect of winning, be able to save strength and find the best positions for defense, keep the salary and maintenance of the army at a high level. If you are a beginner, I can recommend playing multiplayer with more experienced players or for such a strong country as the USA and choose for yourself the part of the country that you will defend with all your might for the first 5 months of the game, and then expand your zone of control. Before counter-offensive, analyze the map: find the best terrain to attack, see if you can destroy bridges with tactical nukes to slow down or completely eliminate the possibility of zombies entering your offensive zone, use cities as strongholds before further offensives, create only those units which effectively fight infantry, it's unlikely that an anti-aircraft missile system or an anti-tank one is a good means of fighting a horde of zombies. If the game is still too difficult, then reduce it's difficulty in the settings: make the economy, military difficulty easier, increase the amount of starting resources, disable the starting debt. When you get comfortable with this scenario, the game will open up to you in a new way, your actions will become more thoughtful, which will increase the interest in the gameplay.