Anyway...why is it that the tomahawk and kukri compliment each other so well? Explain this magical phenomenon...
For several reasons, both combat and utility.
For combat:
If you look at how tomahawks were traditionally used, they almost always carried a long knife also. One would be to attack, one to parry. Which is which depends on the situation. The tomahawk is great at hacking, hooking, and if it has a hammer poll or no poll, can be used in a running attack such that it won't dig in and get stuck. The long knife is great at stabbing, is even quicker to deflect and enemy attack, etc.
Now the kukri would be the long knife in this case. The kukri can either be a much heavier tool, or some of the models come close to the 1 oz per inch ideal of the hawk. Either way, they can stab quite well, perform long, slashing attacks, or even twist around itself for a very hard spine hit. Go to the Himalayan Imports Cantina forum, and look at the thread I started called "khukuri Kata".
For utility, they compliment each other quite well.
Let's face it, most likely the only time you'd be carrying a hawk is in the woods, and the only time you'd fight is if you live in a communist state or country and can't have a gun. So utility matters.
A kukri or hawk on their own make great
tools and you really don't need another. But. . .The hawk is good for pecking, and a hammer poll hawk can easily tap in stakes, wood wedges, etc. The kukri can chop as well, if not better than the hawk. It also has a long edge and can handle machete duty. Combine the two and you have great trail clearing potential. use the hawk to hook some long grasses, give a little twist, and just a drop fro shoulder height, with gravity doing the work and you just guiding the blade, and the kukri will sever the bundle almost effortlessly.
Carry a small knife of your choice with them and you're all set.