Shortly after the start of mission 8, you will have to escort an engineer holding an explosive pole charge up a hill. There is an MG guarding the hill. Shoot the MG to suppress it, Then tell the engineer to move forward. Simply do this all the way up the hill. If he dies then just restart the checkpoint.
Here is a video guide with English commentary!
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https://www.youtube.com/playlist?list=PL-HeW6XkKdUKe25WzwEqI...