Costco

Reservists have been and continue to serve overseas since WW1. I can really only speak to the Marines, but they did generally the same job as active counterparts. There was a hiccup when 3/25 went and got hit hard, and leadership took a second look at how to deploy reserve units, reason being when a reserve unit takes casualties, they're all confined to a geographic area, so you'll have states and towns getting multiple casualties, versus active units, which have dudes from all over the place.

We trained the same as active units, just obviously with less frequency. We were held to the exact same standards. When you went to corporals course, or sergeants course, or squad leaders course, it was active and reserve all together.