The Area 51

You are the commander in chief of the secret military base of Zone 51. On June 27, 2019 you were informed that on September 20, people who want to find out what is outside the walls of the base will storm the base.
Your task is simple - to recruit as many soldiers as possible, improve the defense of the base, recruit the best fighters of this time and repel the attack of a multimillion crowd of people.
Can you hold back the onslaught of the crowd?