installed 'Men of War: Assault Squad' 3 times and tried patching with same result.
You could try to get that DLL file from here. Also provided with it you will find installation info. Word of advice though: INSTALL AT YOUR OWN RISK! Downloading DLL files from unverified sources might be potentially dangerous. Use an antivirus for running security scans first.
These are some common steps to fix DLL errors, try that before downloading DLL files, it might solve your problem.