Merge tables by DateTimeStamp in R

I would like to merge at least two tables using a DateTimeStamp column of the format "%Y-%m-%d %H:%M:%OS" (e.g. "28-Jun-2019 20:50:55.123"). Although at different positions, the DateTimeStamp column is present in all tables, but the interval information and all other columns differ between tables. Every table is in a different tab-separated .txt-file. I would like to combine the information of all tables into one table.

I have:

    A.txt:
    DateTimeStamp              AEvents
    28-Jun-2019 20:50:55.123   X
    28-Jun-2019 20:53:52.237   Y
    ...
    B.txt:
    BEvents DateTimeStamp
    Z       28-Jun-2019 20:52:23.328
    W       28-Jun-2019 20:51:41.962
    ...

I would like to get:

    AB.txt:
    DateTimeStamp              AEvents BEvents
    28-Jun-2019 20:50:55.123   X
    28-Jun-2019 20:51:41.962           W
    28-Jun-2019 20:52:23.328           Z
    28-Jun-2019 20:53:52.237   Y
    ...