No war today is going to last long enough to even think about ordering new heavy equipment (tanks, ships) and having them built before the end.
Modern sophisticated equipment can't be thrown together in an old automobile plant after a few months conversion.
Our wars will either be short and sharp wars against savages like the Iraqi's or a fast nuclear war against China or Russia.
Neither one will require new mass produced equipment.
That may not necessarily be true. If we were to go to war against another nuclear superpower, it might be limited to a protracted conventional war, purely to avoid a nuclear outcome.
Neither one will require new mass produced equipment.
You got that right. If we kept every failing industry afloat in the name of national security we'd still be producing bi-planes for the war against Iraq.