I have written before about the challenges of mounting a cavalry horse with weapons hanging off your body. It is an activity that takes some practice and an understanding of the equipment you're using. I have learned the hard way that you have to make sure your carbine sling is adjusted so that your rifle barrel doesn't hang down too far when you sling it over your back. If the barrel hangs below your knees, you are likely to hook it with your right leg as you throw it up over your horse during mounting. This mistake results in either the rider sitting on his own rifle, or worse, smacking the horse in the left hip with the rifle barrel, causing it to launch forward while the hapless rider still has only one foot in the stirrup. There are other bad things that can happen during this activity and I have experienced them all.
Thus, I was somewhat gratified to learn that our cavalry ancestors didn't have it any better. In fact, it sounds like they may have had it worse according to an anecdote I came across while reading "Gunsmoke and Saddle Leather: Firearms in the Nineteenth Century American West" by Charles G. Worman. Worman recounts the tale of one cavalry recruit, named James Larson, who had enlisted in the cavalry at the beginning of the Civil War and soon found himself learning mounted drill at Fort Wise, Colorado. The new recruits were initially given no saddles and had to make do with only a saddle blanket. Encumbered with waist belt, cartridge box, saber, and carbine with sling they were compelled to vault onto their horse's back unassisted.
With that rig...,we stood...by our horses, ready to mount if we could...When I stood by the side of my horse that morning looking at the long saber by m left side, the lower part of the scabbard resting on the ground about two and one-half feet behind me and the upper part of the scabbard with the hilt projecting out at least one foot in front of me, and the carbine hanging down the middle of my back with the butt end just opposite the back of my head, I wondered if it was possible...
When the command fell there followed a scramble and a terrible rattling of sabers along the line, but only a few could be seen on top of their horses when the commotion was over. The others were either lying on the ground or standing by their horses with a disgusted look on their faces, I being among the last named...
Although, I like to incorporate as much of the old-school training into our riding school as possible, I don't think I want to use this particular training technique. Thankfully, we attach our sabers to our saddles instead of our belts, but there is no way I'd like to see any of our recruits try to jump on a horse with a carbine slung over their backs. We get enough cracked skulls at it is.