Socialism is an economic system in which workers own the means of production. It has nothing to do with centralized planning. If it did it would be to say our anarchist comrades aren’t socialists!

The US military is centrally planned, by and in service of a dictatorship of the bourgeoise— the capitalist class who own the means of production and control the government, and use its institutions to further their interests. Thus it is definitionally a capitalist institution. These are, in fact, the people who would try to kill you if you attempted to install socialism by seizing the means from the capitalists.