For a Call to Arms map to successfully load into the vanilla (standard) game it requires a certain folder structure.
My first step when starting a new map is creating the folder structure for upload to the workshop.
In the image below, the red outline shows the path to the map folder. This is where the Call to Arms Editor saves maps that you create by default.
In this map folder I create a parent folder and name it, in the example below I have named the parent folder smolensk as shown in the blue outline.
Inside the Smolensk folder there should be a localization folder, resource folder and mod.info text file as shown in the image below.












This folder contains a mission.lng text file as shown below.
To the best of my knowledge, the mission.lng text file contains the map names as they are listed in the map menu when hosting a game. It is here you would add your map name. The best way to create this is to download an existing map that someone has created and copy their mission.lng file into your localization folder and add your map name to the list and save it. The example below is what a mission.lng file looks like.





















This is a text file that contains important information about your map. In the below example you can see a line for the map name, a line for the map description, a line stating the minimum game version that can play your map and a line stating the maximum game version that can play your game. Note: The maxgameversion line requires updating to make your map compatible with newly released vanilla game updates. In the example below, the map can be played by all versions up to and including 1.005.0. I usually place a number in here that is a few versions ahead of the current version.




This folder contains a folder titled map as shown below
which contains a folder named multi as seen below
which contains a folder named similar to the example below using your map name. It is inside this folder where you will store your map files when saving your map

I now go into the editor and create my map. At this stage, all i want to do is start a new map with the size i want and add a base texture. I then save (using save as) this map in the folder i created as shown in the below pic.The blue outline shows the path to the 2v2_Smolensk folder i created in the previous chapter. The white outline shows the actual Smolensk folder where the map files will be saved. Note: As you have already created the map name folder it may ask you if you wish to overwrite, if so, select yes. This will simply save the folder as the same name and include the map files.
Close the Editor and view the map folder. You should see that the base map files have been added to the map folder as shown below.


The simplest way to create the game mode mission files is to copy mission files from an existing vanilla map. To do this, open the Editor and create a new map.
Once the new map opens press F3, this will open the mission editor screen. Press Escape and load a mission file from a map that supports the type of game mode you want.
In the series of pics below i will select a 1v1 Last Man Standing (Amunition) mission file from the 1v1 Bridge map in the vanilla game.
After pressing escape and load i select the multi folder as seen below
I then select the 1v1_bridge file as seen below
Inside the 1v1_bridge file are the mission files that are playable for that map in the vanilla game as shown below. In this example you will see ammunition (Last Man Standing game mode), battle_zones (Domination game mode) and Heroes game mode mission files. For this example i select ammunition as i want to create a Last Man Standing Map
The mission and map you selected will now load in F3 mode. As you can see below.










Once loaded, press escape and save. This will save the mission file only to the following file path:
Call to Arms/resource/map/multi/"name of the map where you saved the mission files from
as shown below. Note i saved both the Last Man Standing and Domination mission files.
Close the Editor.

Now select both mission files and copy them to your original map folder you created in chapter 1. As shown below.

Open the Editor and load your original map. Once loaded press F3 and load the mission file that you copied across. The mission file should appear by default as seen below.




This will now load the mission file into your map as seen below. You can see the spawn points for each team, the flag point for each team and the ammunition zones that will appear during the game. You can now move any of these around your map as you want. Once you have finished moving them, save the mission file in F3 mode.

Once saved, press escape and unload the mission file.
Press F2 and start designing your map around your spawn and capture points remembering to save along the way. It is always helpful to load your mission file to see if your design suits your capture points etc. Remember to unload the mission file when finished with it.

Next chapter will show how to add the map.info file, header and preview images.

This is a text file titled map.info. It sets the min and max players for the map and the default camo for your units.
This file is placed in the same location as the map files you created earlier. The blue outline in the pic below shows the exact location within your map folder.
Below is an example of what the map.info file should look like. The easiest way to create it is copy a map.info file from a map you have downloaded off the workshop, paste it into the your map folder and edit it to reflect your map setup.
In the example below, the various lines identify my user name, the games max players (the number here must be no higher than the amount of spawn points you have), the texture modification (details the default camoflage scheme for your units) and the min and max players for ranked games (note that ranked games are not available in Call to Arms at this time Aug 2018)

The header.jpg is located in the same directory as the map.info file as shown in the top pic of this chapter. The header is the picture a player sees at the top of the server lobby when they join a hosted game. The header is also the picture seen when a player presses escape in game.
The pictures below show the header for both locations. It is important to ensure your header is not too high otherwise when a player presses escape, the header will cover the back,options and close buttons on the escape screen. As a guide, the header in the below pic is 1485 long by 500 high.
and

The preview.jpg is also located in the same directory. This is the image the player sees during the loading screen after the host has pressed start in the server lobby. The dimensions of this file can be whatever you want but it is important to know that the image will be stretched to meet your screen size, so dont have it too small or it will look grainy.

Hope this helps.

This chapter will cover the process of uploading your map to the Steam Workshop.
Uploading to the workshop is done using the Call_to_Arms_Workshop.exe file found in Call To Arms/binaries/x64. As shown below. As this is an executable, it wont work if you have the editor or game open.


Double click on the executable to open the DMS Workshop Uploader. When it opens you will see the screen shown below.
The area outlined in orange displays your existing items presently on the Call To Arms Steam Workshop.
The buttons to the right do the following.
Use this button when you want to upload a new item to the work shop. When you click this button, the screen shown below will appear.
Upload Directory:
This identifes the directory where the map/mod you wish to upload resides on your computer. Click the small radio box to the right to browse for your map directory.
Preview Image:
This is the image players see when browsing through the workshop looking for maps/mods. It must be 512x512 pixels in size or it wont work.
Tags
You can set the tag to identify your map or mod in the steam library. This assist players finding your map/mod when they do a refined search based on tags.
Title
Sets the name of your map/mod as you want it displayed in the Steam Workshop
Description
Describes your map/mod once uploaded to the Steam Workshop
Visibility
Sets the visibility of your map/mod once uploaded to the Steam Workshop. The default is hidden and can be changed in the Steam Workshop also.
Contribution Agreement
Must be ticked to upload
Publish
This is the button you click when all fields are completed. If any fields are not completed you will not be permitted to publish your map/mod.

You click on edit to upload a map that already exists on the Steam Workshop. Once you click edit, it will ask you to select an existing map from the list that you wish to edit. Once you select the map name the below screen will open.

The only field you need to edit in this screen is the upload directory. Once again, this is the location of your edited map on your computer. It will overwrite the files that you changed in your map directory on your computer.
Note: When you publish an edited map, the visibility will once again default to hidden. You will need to change this for people to see your map/mod.

Edit Mod.info
The Edit Mod.info button allows you to quickly edit the mod.info files of your maps on your computer. This is particularly useful when you need to update your maps when a newer version of the game has been released. Insted of going into each map on your computer, you can simply select their location and edit the mod.info via the uploader. An example of what you can change is shown in the pic below.

Once again, remember that when you click submit it will set your item to hidden by default in the Steam Workshop.

This button removes your item from the Steam Workshop. Before doing so, ensure you have a copy saved somewhere on your computer.

And that is it for the Uploader.