I remember having Action Man in the mid 70's, it was very popular wit young boys back then. A 40th anniversary edition of Action Man was reissued a few years back and my son ended up getting a few of the classic costumes like the Arctic Explorer, SAS, German Stormtrooper, British Army Officer, German Tank Commander, Diver, Royal Marine, and Africa Corps. Lego I personally think is still the best toy on the market, especially the Marvel, DC, and Star Wars editions. Wish they had of been about when I was a kid.
I think the US had their own version of Action Man and it was called GI Joe.