Lately I have been doing the wrong thing on my Civ2 wars.
I'm good with strategy. But some times desparation or excess of trust in the strnght of my forces makes be leave strategy behind and send tons of soldiers to death in wasteful tacticless attacks.
When I am at war with someone, I just forget to keep my diplomacy with the other civs, and, if they decide to come and declare war, I just acumulate enemies.
In the end, I almost never accept the cease fire agreement of my defeated enemies, and keep my attacks on them.
But I often start my wars with a huge army and a great reserve of gold. After some turns of war, and after conquering some enemy cities, I just have no gold or attacking units anymore. Then I start to build many weak attacking units, just to keep the war going on and to keep my enemies away from my cities. Thus the war lasts for centuries.
In those long wars, I often stop using any kind of strategy and send my weak attacking units on "human wave"-style attacks.
If I accepted the cease fire and took the time to build a new offensive army, I would be capable of destroying my enemy in a few turns from the starting of a new war.
But with the weak attacking waves that I throw, my victories become slower and slower, and sometimes there's a stalemate in the battlefields for decades.
Oh, and I also do not like to use artillery units such as catapults, cannons and artillery. So I just send knights/cavalry/armors to direct combat.
that are phalanx and they defend my cities for very long 
...
