I don't know if one boot can do jungle and swamp then turn around and do mountains, glaciers, snow and ice.

I don't care for military style boots for hiking and climbing. Civilian backpacking boots are stronger, lighter, more comfortable, and more versatile. For a good general purpose boot it's hard to beat a full-grain leather medium backpacking boot with a Goretex liner. You can add thicker or thinner footbeds and socks, depending on conditions. My current boots are Asolo 535's (without the Goretex - my feet sweat). The Asolo 520's are the same boot with Goretex.

Good luck! It sounds like a great trip.

Kevin B.