I've pledged to the Vanguard on one character. On my other two characters, the Drifter has no milestone related to the Allegiance quest line, and speaking to him doesn't prompt me to choose a faction to side with.
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Edited by BNGHelp6: 3/25/2019 11:34:23 PMHey there. Have your two characters played a match of Gambit Prime and Reckoning? After you finish Gambit Prime, go speak to the Drifter who will give you a Weak Synthesizer which allows you to go into The Reckoning. Then, you should be able to pledge allegiance.