US Army ships =
My question is simply why cannot many of these be combined. Let the "air force" operate all air craft. And, make the operators of those aircraft act as land-based spotters so they will know the other side of their operation.
Let the "navy" operate all water craft.
Combine the Seabees and the Army engineers, along with the AF Red Horse squadron.
That would never happen, and would cause a horrible lost in our effectiveness as a military.
Each branch trains it's personnel to fit their needs. Marines specialize in Naval operations, Army specializes in Ground operations. The Air Force concentrates on Air Intercept and great big honking planes that pour a lot of death and destruction on the heads of our enemies (as well as missiles that reach them on the other side of the planet).
Every level is highly specialized. Following that logic, let's then put all submarines under the Air Force, because they also have ICBMs.
Take away all Helicopters from the 101st and Navy and Marines, shut down For Rucker. Now all branches have to go and beg from the Air Force all personnel and equipment.
Heck, why not just take the artillery away from every branch and make up an Artillery Corps? Now everybody has to scream and fight to get the services they need, instead of having it internal to their own organization.
There is such a thing as to much specialization, as much as there is not enough. We have 3.5 branches of military for a reason.