History of Close Combat

Close Combat: defeat targets with Sidearms, Shotguns, Fusion Rifles, Glaives or Swords. Defeating Guardian opponents grants more progress. The objective is 77,000 close-range weapon final blows.

How to complete

Use any of the five listed weapon types in any activity; PvP kills count for more than PvE kills. Because the target is large, a Sidearm or Shotgun in strikes and Gambit/Crucible is a practical way to accumulate it.

Unconfirmed

I could not find a guide describing this triumph, its season, seal or reward; the details above come from the game text only (the tip about using sidearms or shotguns is my suggestion, not sourced). Related: Shotgun Mastery, Sidearm Mastery.