The Sherman Anti-Trust Act, passed in 1890 was to break up industrial complexes from Civil War. Didn’t work as corporations grew in power anyways.
Many will say democracy fails when half figure out that they can vote to transfer wealth from the other half.
What really happens is that large corporations simply pay both parties to get what they want.
US was brought into WWII at the behest of the large corporations. Why did we mainly focus on Germany when it was Japan that attacked us and posed the largest threat of invasion of the west coast?
Not really. The large industrial complexes it was set up to deal with mostly emerged in the 70s and 80s, with Standard Oil, the symbol of all the trust-busters hated, being started in 1870.
The emergence of these giant industries had little to do with the war, they developed out of post-war conditions.