The US military suddenly started talking about its territory as a possible site of a major war. The Pentagon's fortress plan calls for preparing large bases in the continental United States within 90 days without outside support. According to Fox News, we are talking about electricity, water, fuel and communication. This period was determined in documents reviewed by journalists, and there is no publicly available report of the successful three-month tests. If civilian networks fail, the military intends to maintain essential operations. US Defense Secretary Pete Hegseth announced Fort America on September 30. Pentagon spokesman Sean Parnell explained to reporters that relying on city power grids to organize national defense is too dangerous. A disconnected substation will leave headquarters communications, pumps and some repairs without power. The power line runs outside the base fence. Therefore, the project requires bases to create their own power supplies and backup connections that can operate separately from the general grid. The 90 day requirement reveals the scope much better than the backup generator story. With a conditional fixed load of 1 MW, the facility will require 2160 MWh in 3 months. The actual bases consume differently, so the calculation serves as an example and not an estimate of the Pentagon's needs. The battery helps survive the transition to backup power. The generator will need fuel. Independence is measured across the entire energy supply chain, including equipment maintenance. The Pentagon has already started working on the nuclear part, although it is too early to guarantee immediate readiness. In August, the US military selected five companies to build micro reactors at sites including Fort Bragg in North Carolina and Fort Hood in Texas. The planned ceiling for the Janus program is 2.2 billion dollars. The army expects to receive the first operational installation by September 2028. The suppliers have been selected, the future generation has not yet been created. The existing reserves are still working.