A truly great RTS game with a macro-scale focus.
Units are grouped into companies which must be carefully crafted, can be lead by a hero, and will stay with you throughout the game, gaining experience and so forth. Smart design calls such as stationary units gain a defensive advantage if they stay in the same spot over a long period of time, as well as the retreat/rout/morale system and zone of control means that positioning is very important in Kohan. Additionally, terrain plays a huge role, as different terrains have very large effects on combat and movement, and natural chokepoints are crucial to hold for similar reasons.
Cities are condensed into single buildings, which house a number of 'component slots' that are filled by buildings, and again the design forces careful economic planning, for instance focusing on gold income for the long-run or pumping out valuable resources such as iron to fuel a war effort. Resources in the game are not cumulative besides gold-- meaning that you are rarely encouraged to sit back and do nothing in the game.
The game also comes with several large campaigns, a random map generator, a custom scenario editor, fairly competent AI (with the ability to make your own / download them online), and extensive modding tools. There are a huge number of heroes, secret technologies and monsters to keep the game fresh game after game after game.
Besides this glowing review, I would point out two flaws:
1. A faltering online community. The game is old, and few people play anymore.
2. The game is somewhat unbalanced. While the game is usually tight, there are a few degenerate situations, and on very large maps the game is very unbalanced. However, you can play on very small maps to fix that, and much of the game imbalance can be addressed via modding; personally, I advise a mod which increases the gold penalties for going negative with your resources, as well as making resources scarcer.
Still, it is a game worth playing, and better than its successor. I hope we see a worthy sequel someday.