I've had a canvas Jansport for almost 30 years, I carried it for 3 years in middle school and it's been a hiking backpack since. If they're still made the same and you get a cloth one instead of those plastic character backpacks then it should last forever.
In games that have gender based perks, like Agent of Dibella in Skyrim or LadyKiller/Black Widow in the Fallout games tend to be stronger for female characters because more of the NPC's are male. This is more adding another reason than claiming that it's the main reason. I don't exclusively play either male or female but typically when I play a female character it's because I'm building a character that is less physically aggressive. I know this is playing into stereotypes but sword and board tends to be male while stealth archer tends to be female.
French colonization of Vietnam was what the VCP were fighting against at the beginning of the war. The Soviet Union and China got involved to help kick France and Britain out and US involvement came when it was clear France and Britain had lost the war. But other than that and the coalition troops I guess Europe wasn't involved in the Vietnam War.