[QUOTE=Ranger Jeff]
With Helo, HALO, and HAHO insertions, inland SF raids are quite viable, depending on the objective and how it’s defended.
[/QUOTE]
[QUOTE=Measure for Measure]
Here’s a glossary for those unfamiliar with a few of these terms.
From https://en.wikipedia.org/wiki/HAHO: High altitude military parachuting
HAHO: (high altitude - high (parachute) opening)
HALO: (high altitude - low (parachute) opening)
That leaves HELO, which refers either to helicopter or Highly Elliptical Lunar Orbit.
[/QUOTE]
First, by “Helo”, I was referring to a helicopter. I might have gone with “Chopper” or “Helicopter”, but I liked the alliteration and the rhyming. 
Wesley, briefly, with HAHO, yes. Not with HALO.
Long version. Either way, you’re going to use the same equipment. You’ve got a suit (used to be sheepskin lined leathers, now it’s probably some synthetic electrically warmed suit) that’ll keep the jumper warm at 30,000 feet where he exits the aircraft. There’s an oxygen bottle and mask with eye protection. And he’s got a 85 lb or so equipment bag attached with some quick release doohickies to the front of his harness. It probably goes from the bottom of his chest to mid shin. There’s a 15’ strap more securely holding the bag to the harness. For the last hour of the flight in, before they jump, they start breathing pure O2 from the system installed in the aircraft to flush the nitrogen out of their system to avoid getting the bends.
For a HALO jump, you’ll start out with the same horizontal velocity of the aircraft you’re jumping from. Air resistance will slow that down and your vertical velocity will increase until you reach terminal velocity. If you want to fall faster, you can “ride the tube”, where you manage, instead of a flat, belly down descent, to get into a head down position. Where/when you open your chute is tricky. You want enough time/height (above ground, not sea level, so watch that altimeter carefully and pay attention to the mission briefing) for your chute to fully inflate and to lower that equipment bag the 15’. So, maybe at 300 or 250 feet you’ll pop the chute. You won’t travel all that far from where you exit the plane. Probably not much more than 3 miles?
HAHO is a different story. Instead of pulling the D-ring to open the chute, more likely it’s a tether jump, so the chute will inflate hopefully just after you clear the tail of the aircraft. And you’ll lose a lot of your horizontal velocity. The chutes used for a HAHO are inflatable and steerable wings. I can’t be buggered to look up the exact specs, but let’s say there’s a 5:1 glide ratio (it’s probably more). That would mean that in still air, you’ll move forward 5 feet for every foot you descend. So, jumping from 30,000 feet (call it 5 miles), you could travel 25 miles from where you jump. And if you’re dropped off upwind of your destination and there’s a good tail wind, you’ll travel farther. Chutes for HAHOs have lights rigged on the top on either side; one green and one red, like marker/position lights on a plane. Remember, you’d probably be doing this at night anyway. The team, squad, platoon, whatever will descend in a trail formation, with the first guy doing the navigating and everyone else following him. I don’t know when they’d lower the equipment bags.
HALO or HAHO, The bags hit the ground first giving the jumper a couple seconds warning to pull both handles to get as much lift as possible to slow himself before he hits the ground. With these chutes, it’s possible to do a stand up landing without breaking anything, but if they’re smart, the tried and true Parachute Landing Fall (PLF) is probably safer.
That is, if the word “Safe” can really be applied to making a parachute jump into a combat situation. :dubious: