▁from ▁un loading ▁arms ▁for ▁the ▁Mexican ▁government ▁in ▁the ▁port . ▁On ▁April ▁ 2 2 ▁Mexico ▁for ▁the ▁time ▁being ▁ends ▁diplom atic ▁relations ▁with ▁the ▁U . S . ▁ ▁April ▁ 2 3 ▁– ▁The ▁baseball ▁stad ium ▁We eg h man ▁Park , ▁later ▁known ▁as ▁W rig ley ▁Field , ▁opens ▁in ▁Chicago . ▁ ▁May ▁ 1 4 ▁– ▁Wood row ▁Wilson ▁signs ▁a ▁Mother ' s ▁Day ▁pro clam ation . ▁ ▁June ▁ 1 ▁– ▁Wood row ▁Wilson ' s ▁en voy ▁Edward ▁Mand ell ▁House ▁meets ▁with ▁Kaiser ▁Wilhelm ▁II ▁of ▁Germany . ▁ ▁July – Se ptember ▁ ▁July ▁ 4 ▁– ▁Lex ington ▁Avenue ▁bomb ing : ▁ 4 ▁people ▁are ▁killed ▁in ▁New ▁York ▁City ▁when ▁an ▁an arch ist ▁bomb ▁intended ▁to ▁kill ▁John ▁D . ▁Rock ef eller ▁expl odes ▁prem ature ly ▁in ▁the ▁plot ters ' ▁a partment . ▁ ▁July ▁ 1 1 ▁ ▁Baseball ▁legend ▁B abe ▁Ruth ▁makes ▁his ▁major ▁league ▁debut ▁with ▁the ▁Boston ▁Red ▁So x . ▁ ▁USS ▁Nev ada , ▁the ▁United ▁States ▁Navy ' s ▁first ▁" super - d read n ought " ▁batt les hip , ▁is ▁launched . ▁ ▁Over ▁ 5 , 0 0 0 ▁attend ▁a ▁r ally ▁in ▁Union ▁Square , ▁Manh attan , ▁called ▁by ▁the ▁Anti - Mil itar ist ▁League ▁to ▁comm emor ate ▁the ▁an arch ists ▁killed ▁in ▁the ▁July ▁ 4 ▁Lex ington ▁Avenue ▁bomb ing