Back in the late 60's we started doing lifts using Maguire Rigs and Ladders and down through the years the Militaries around the World have improved upon the technique and later brought in Fast Roping as an Insertion method.
Ladders very quickly were found to be useless and quite dangerous as well as slow and cumbersome.
This is a very common Military procedure these days especially for SpecOps troops.
The US Forest Service also conducts what it calls "Short Haul Operations" used to move Human External Cargo (HEC).
https://www.fs.usda.gov/sites/defaul...Operations.pdf