Array
(
    [1914] => Array
        (
            [June] => Array
                (
                    [23] => A deepened Kiel Canal opened by the Kaiser
                    [28] => Archduke Ferdinand assassinated at Sarajevo
                )

            [July] => Array
                (
                    [26] => Austria starts mobilisation on Russian border
                    [28] => Austria declares war on Serbia
                )

        )

    [1915] => Array
        (
            [October] => Array
                (
                    [15] => UK déclare la guerre à la Bulgarie
                    [17] => La France déclare la guerre à la Bulgarie
                )

        )

    [1918] => Array
        (
            [November] => Array
                (
                    [11] => General armistice signed at 5 a.m.
                    [16] => Allied soldiers begin their move towards Germany
                )

        )

)