Zimmerman note discovered Berlin to Mexico City Foreign minister Zimmerman ask Mexico to join Germany in exchange for return of sothwest U.S Bristish intercept message (0h 55min, feb 1, 1917 y – 6h 9min, feb 28, 1917 y)
Added to timeline:
Date:
0h 55min, feb 1, 1917 y
6h 9min, feb 28, 1917 y
~ 27 days