I haven’t played in a long time, and just started the personal mission chain. Can’t seem to figure how to get the LT-5 mission to complete:

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LT-5: Enable allies to destroy 1 vehicle spotted by you. Honors: Enable allies to cause damage to 2 enemy vehicles spotted by you.

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I’ve gone through a couple battles now with a tank highlighted by me and watched it get destroyed, but no mission progress made. What am I glancing over here?