“’20 and ’21 is where we need to make sure we don’t kind of hit turbulence,” McCarthy said. “The budget deal was great — we had an enormous increase, and we’re grateful for that — but this (sequestration) still looms.”

The Army’s modernization initiatives aren’t plunging into the valley of death this week or even, in most cases, this year. It will take time to build prototypes, to test them and to figure out how the force will make the most of new technology. But over the next few years, enough of these projects have to make it across that daunting gap to actually change the Army.

What mission does the Army really need armed robots for — expendable scouts, perhaps, or supplementary fire support? And does buying robots for that role really offer more tactical value than spending the same money on mundane upgrades to, say, self-propelled artillery?

Today, Brig. Gen. McIntire told me, Army field artillery and air & missile defense are like two boxers, one who can only punch and the other who can only block. “We’ve got to have one boxer that has the ability to strike and block simultaneously,” he said. “That’s the speed that we’re going to need in the future.”

What should the device show the soldier? “Where am I? Where are my buddies? And where is the enemy?” said Gen. Townsend. “Then other stuff could be optional.”

The Army’s new emphasis on armed recon could potentially disrupt the all-service Future Vertical Lift project (FVL).

Unlike the Taliban, Russia and China can shoot down our drones, jam our transmissions, and hack our computers. So to prepare to fight them, we need a very different communications network — one the US Army is now studying how to build.

The Army is modernizing three artillery systems: 155 cannon, the cheapest option, for the close fight against the enemy’s frontline forces; guided rockets for the deep fight against enemy reinforcements and supply lines; and missiles, the most expensive munitions, for very deep or even strategic strikes against targets in the enemy rear and homeland.

All this technology serves a new concept of operations for defeating dense advanced air defenses of the kind Russia and China are both building for themselves and selling abroad.

The long-term solution may take “big, leap-ahead technology,” said Maj. Gen. Pete Gallagher, head of the Cross Functional Team leading the network overhaul. But short-term solutions can be as simple as replacing bulky metal antennas with inflatable ones or loading new software on an off-the-shelf Android phone.