The former English Defence League (EDL) leader, 35, shared footage of a crowd of Army personnel who chanted his name.
"A moment like this makes it all worth while. Today I met real British heroes," he wrote alongside the Facebook post.
Robinson, who said the men were "young recruits", began the video by telling viewers: "Most honourable morning I've ever had."
He then panned across to show a group of young, camouflaged soldiers who started chanting "Tommy Robinson".
It is unclear why they were cheering and there is nothing to suggest the cheering men are EDL supporters.
The Army said it is aware of the photograph and footage and is "investigating the circumstances surrounding this".
A spokeswoman said: "Far right ideology is completely at odds with the values and ethos of the Armed Forces.
"The Armed Forces have robust measures in place to ensure those exhibiting extremist views are neither tolerated nor permitted to serve.
"Anyone who is in breach of the Army's values and standards will face administrative action."
Robinson, real name Stephen Yaxley-Lennon, responded to the news of the investigation defiantly on Instagram.
He wrote: "Watch the backlash if the army attempt to discipline these young recruits for expressing one of their very freedoms they are expected to fight & die for".
The controversial figure also changed the profile picture on his Facebook page to him posing with several soldiers.
Robinson was jailed in May after filming people involved in a criminal trial and broadcasting the footage on social media.
However, Robinson had his conviction quashed by three leading judges and is now facing a fresh hearing over charges.
He was sentenced to 10 months' imprisonment for contempt of court, which he admitted, and a further three months for breaching a previous suspended sentence.
Hundreds of his supporters amassed outside the Old Bailey during his trial in late September.
Source: Read Full Article