Adjust many parameters of the mortar turret introduced in https://mods.factorio.com/mod/ironclad-gunboat-and-mortar-turret-fork to provide a strategy gameplay. Instead of just damage group of enemies from long distance, the modified mortar turrent can use new types of mortar shells from a shorter distance. Those new type of mortar shells have longer reload time, but provide another layer of protection to your defense. Some issues in the origin mod also be fixed, such as missing locale keys and mortar turret was not able to connect to circuit wire. AAI ironclad vehicle can also use those new ammos by control the ship manually.

Some notes: if you already have mortar turret in your save prior install the mod, you should be aware that mortar turret range is reduced and therefore you many need to modify your defense design.

New strategy mortar shells:
1. Slowdown shell: slowdown group of enemy like slowdown capsule, but has very longer reload time.
2. Poison shell: introduced from origin mortar turret mod but now categorize as strategy mortar shell, create a poison cloud to damage enemies inside.
3. Fire shell: introduced from origin mortar turret mod but now categorize as strategy mortar shell, create some fires and damage nearby enemies.
4. Defender robot shell: deploy a weaker defender robot which will patrol the turret's latest shell landing location.
5. Distractor robot shell: deploy 3 weaker distractor robots which will stay at a fixed location.
6. Destroyer robot shell: deploy 5 weaker destroyer robots which will patrol the turret's latest shell landing location.
7. Energy shell: deal electric damage to group of enemies and stun them (like discharge defense equipment)
8. Heavy shell: deal high physical damage in a small AoE, but allow mortar turret to fire it from a much longer distance with longer reload time.

The mod is still work in progress, let me know if you have any suggestion / balance idea in discussion.
Thanks FiveYellowMice for all the hardwork involved in this mod :3