What were the Nazi's interests in beginning the development of the helicopter?

What were the Nazi’s interests in beginning the development of the helicopter?

To my understanding it was the Nazi’s who first tried to seriously develop the use of helicopters as military weapons. However, it was one of the too late “wonder weapons” projects that got cut short by the end of the war.

It is my understanding that through Operation Paperclip, the US was able to provide some asylum for former Nazi engineers involved in the helicopter program, who helped found the US military helicopter program.

Why were the Nazi’s interested in developing the helicopter? Did they see it as a potential anti-tank weapon? A less costly and ‘potentially safer’ (vs high flying planes and crash landing gliders) and more versatile resupply mechanism? Did they see it as a potential counter insurgent weapon?

Brian Ghilliotti