LS11 UNKNOWN
LS12 UNKNOWN

[These medals are listed at royalark.net as Military Medal and Gendarmerie Medal ca 1970, however these names and descriptions are unsupported (i.e some (unknown) person told me that's what they are).]

Follow-up with site owner indicates that there is no documentary or factual basis for the description - i.e. "some lao guy just told me this".

Extract from royalark.net (16 May 2009):

The Military Medal (L) and the Gendarmerie Medal (R)

The Military Medal: instituted by King Savang Vatthana ca 1970 as a reward for brave conduct and meritorious service in the regular military forces of the kingdom. A bronze star is awarded for each mention-in-dispatches at the brigade or regimental level, a silver star for the divisional level and a gilt star for the corps level. Bronze palms are awarded for a mention at the army level.  
The Gendarmerie Medal: instituted by King Savang Vatthana ca 1970 as a reward for brave conduct and meritorious service in the national police forces of the kingdom as the gendarmerie equivalent of the Military Medal.