I noticed when making troops, i do not see how to get rid of them if i were to want to replace for example militia with tier 2 troops. Is there an option to do that?
There is no straightforward way of doing this (no dismiss troops bottom). In order to get rid of troops they need to be killed in conflict. So either attack someone or get hit. On offense you will have troops killed on every attack (lower tier/power troops first die first) and if you fail an attack you will have more loses and deaths. On defense troops will only be killed if you are over hospital cap.
I don’t see why you would want to remove troops. You can easily use both troops and once you unlock guards you don’t ya e to train militia anymore. Getting rid of troops would only reduce your might. Trying to see what is gained from removing militia.
As it stands at this point in time, the weakest get injured first which means that they will take your hospital space. Which means that you can lose t2 troops or higher if someone attempts to zero you.
You, can only have up to a certain amount of troops per march, which can be increased by research, it's probably not letting you use your guards because your filling your entire March with militia.