2519

March

 * March: Naomi Sentzke's flash clone dies. Lena Sentzke is sterilized soon after.

June

 * June 3: Taylor H. Miles is born in Losantiville, Seven Hills, on Mars.

July

 * July 12:
 * At 0630 hours, the Spartan-IIs, in their second year of training, are sent to the Military Wilderness Training Preserve in the snowcapped mountain range on Reach.
 * From 0645 to 0801 hours, John-117 explores the forest until joining up with the rest of his teammates.
 * At 2104 hours, the Spartans have returned to the Reach Naval Academy after stealing an Albatross dropship. John-117 earns the status of Squad Leader.

September

 * September: Lena Sentzke commits suicide.