Didn't Germany invest in one big army with a heavy focus on homeland security (Gestapo)? It was their inability to fight a 2-front war that killed them.
What good is homeland security when you have no homeland?
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The Pentagon's most senior planners are challenging the longstanding strategy that requires the armed forces to be prepared to fight two major wars at a time. Instead, they are weighing whether to shape the military to mount one conventional campaign while devoting more resources to defending American territory and antiterrorism efforts.
Germany was in
a world in which enemies
equal or larger
could wage war with them.
Today, the United States
is the only state
that can project force
of really serious size
any where on Earth.
But we are stuck with
small and medium threats from
dozens of sources.
Sounds like we should change,
and sounds like German was
a whole different case.