killing our friends

So it looks like on Tuesday U.S. forces "accidentally" killed 50 members of a tribal group that had been allies in the so called "war against terror".

Now where have we seen this sort of thing before? How about the way we treated the Hmong?

From the wiki article:

In the early 1960s, the U.S. Central Intelligence Agency (CIA) began to recruit the indigenous Hmong people in Laos to join fighting the Vietnam War, named as a Special Guerrilla Unit led by General Vang Pao. Over 80% of the Hmong men in Laos were recruited by the CIA to join fighting for the U.S. Secret War in Laos.

and after the war was over?...

the Secret War began around the time that the U.S. became officially involved in the Vietnam War. Following the U.S. withdraw; from Vietnam in 1975, the Lao kingdom was overthrown by the communists and the Hmong people became targets of retaliation and persecution. While some Hmong people returned to their villages and attempted to resume life under the new regime, thousands more made the trek to and across the Mekong River into Thailand, often under attack. This marked the beginning of a mass exodus of Hmong people from Laos. Those who did make it to Thailand generally were held in squalid United Nations refugee camps. Nearly 20 years later, in the 1990s, a major international debate ensued over whether the Hmong should be returned to Laos, where opponents of their return argued they were being subjected to persecution, or afforded the right to immigrate to the U.S. and other Western nations.

Of those Hmong who did not flee Laos, somewhere between two and three thousand were sent to re-education camps where political prisoners served terms of 3-5 years. Many Hmong died in these camps, after being subjected to hard physical labor and harsh conditions. Thousands more Hmong people, mainly former soldiers and their families, escaped to remote mountain regions - particularly Phou Bia, the highest (and thus least accessible) mountain peak in Laos. Initially, some Hmong groups staged attacks against Pathet Lao and Vietnamese troops while others remained in hiding to avoid military retaliation and persecution. Spiritual leader Zong Zoua Her rallied his followers in a guerilla resistance movement called Chao Fa (RPA: Cob Fab). Initial military successes by these small bands led to military counter-attacks by government forces, including aerial bombing and heavy artillery, as well as the use of defoliants and chemical weapons.

Small groups of Hmong people, many of them second or third generation descendants of former CIA soldiers, remain internally displaced in remote parts of Laos, in fear of government reprisals. Faced with continuing military operations against them by the government and a scarcity of food, some groups have begun coming out of hiding, while others have sought asylum in Thailand and other countries.