The weapon was standard issue to British and Commonwealth forces which attempted to stem the Japanese onslaught through the Pacific theatre. At Milne Bay, the weapon proved completely ineffective. It also failed to stop Japanese tanks in Malaya. Some accounts claim that the &lt;a href="1st%20Punjab%20Regiment"&gt;1/14th Punjabi Regiment&lt;/a&gt; knocked out two light Japanese tanks at a roadblock. During the Battle of Singapore, the 1st Bn Cambridgeshire Regiment claims the Boys was very useful in knocking holes through walls during street fighting. After the war in the Pacific, the gun was used by Royal Malay Regiment to fight against communist insurgents during Malayan Emergency.