Vickers 6-Ton Commercial Tank of the Royal Siamese (Thai) Army on manoeuvres in Thailand, mid-1930s.  The Thais used these tanks against the Chinese in the Indo-China War of 1939.  The Chinese probably used similar tanks at the same time, in the same war.  Best regards, JR.

Vickers 6-Ton Tank - far from home ...

OSS Deer Team members pose with Việt Minh leaders Hồ Chí Minh and Vo Nguyen Giap during training at Tan Trao in August 1945.

Minh and the OSS

Vickers 6-Ton Commercial Tanks were also purchased by Portugal - a (very) long-time ally of Britain, but one that would (for its own reasons, profitable and otherwise) declined to join its old ally in WW2 (it had, in fact, joined in for WW1).  The near tank appears to be labeled "Republica", the far one "Portu[guesa?].  Best regards, JR.