1974 - The Netherlands is the first country to ban discrimination against gays in the military. [1]

1992 - Canada lifts gay military ban. [1]

1993 - Israel enforces policy to allow gays and lesbians to serve openly and without discrimination. [1] Gays in the IDF also have additional rights to ensure their safety and comfort.

July 2003 - Russia resolves ambiguity in policy in favour of allowing those with "non-standard sexual orientation" in the military. [1]

2008 - DADT affects minorities disproportionately [2]
Dept of Defence data shows that 71% of the active force is white and 85% is male. Of the 640 service members discharged under DADT in the 2008 fiscal year, 45% were racial minorities and 34% were women. In 2007, though women made up 14% of the Army and 20% of the Air Force, discharges totaled 46% and 49% respectively. [3]
UK - military personnel are permitted to attend Gay Pride marches in uniform. [1]

January 2009 - 11 employees discharged [4]
1 human intelligence collector
1 military police officer
4 infantry personnel
1 healthcare specialist
1 motor transport operator
1 water treatment specialist
+2 more

September 2009 - more than 265 service members have been discharged since Obama took office. [3]
The Pentagon has spent more than $200 million taxpayer dollars to replace service men and women discharged under the ban since 1993, according to a 2005 GAO report. A 2006 Blue Ribbon Commission Report found that the total cost of implementing “Don’t Ask, Don’t Tell” between FY 1994 and FY 2003 was at least $363.8 million. The military has discharged almost 800 “mission-critical” troops and at least 59 Arabic linguists and nine Farsi linguists under “Don’t Ask, Don’t Tell” in the last five years.
Argentina officially ended its gay military service ban this year. [1]
Philippines lifts ban on gays in the military. [1]
Spain rules that transgendered individuals are, as previously with gays, allowed to serve in the military. [1]
Uruguay lifts prohibition on gays in the military. [1]

December 2009 - 96 legislators request detailed DADT data from 2009. Rep Ileana Ros-Lehtinen is the only Republican on the list. [5]
Peru lifts ban on openly gay service members. [1]

March 2010 - Lt Dan Choi and Capt James (Jim) Pietrangelo handcuff themselves to the White House fence after an HRC benefit. Both are arrested for "failure to obey a lawful order by a police officer." Also arrested are Robin McGehee and 9 others from GetEQUAL.