I really don't like Lutris because of how buggy and busted it is sometimes. So this guide is for people like me - who want Plutonium to just work, without needing Lutris.
First off, you would be best to install the staging version of WINE, as it includes the newest features and I've had very good luck with it over the past 5+ years.
You can get WINE here : https://wiki.winehq.org/Ubuntu
After you have wine staging, just run these commands in a terminal. Make sure you have all of your windows applications CLOSED before you do this, as the installers it will open will hang. After you run this, you should be able to play WaW, Bo1, Bo2 just fine, as I play them all of the time on Linux. MW3 should work fine as well, but I have not tested it.
Run these commands after you get wine staging.
sudo apt update
sudo apt install winetricks -y
sudo winetricks --self-update
winetricks -q --force dotnet48
winetricks -q d3dcompiler_47 corefonts
winetricks -q vcrun2005
winetricks -q d3dcompiler_43 d3dx11_42 d3dx11_43
winetricks -q gfw msasn1 physx
winetricks -q xact_x64 xact xinput
Optional : open winetricks and install latest DXVK for optimal performance. DXVK works as of 2.0.
Credit for most of the winetricks commands goes to Nawa. Realistically, you can run these games with just dotnet48 and directx, but this offers higher compatibility and reduces glitches.