[@LetMeDoStuff]My submission for an alternate experimental gear for my combat engineer. There's some deviation from true history, obviously, but I'd hope that my explanation for that is adequate. Let me know what you think:

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Originally developed in secret by Louis Fieser and a team of skilled chemists at Harvard University and handed off to the British for use in Europe, 'napalm' saw it's first use by the Royal Air Force during the defense of England in 1942. Though it could not turn the tide of battle due to how little was produced at the time, the weapon, when deployed, was devastating. Water proved ineffective at dousing the gelling agent/petrol concoction.

When Operation Sealion proved successful, and the Wermacht overrun the English forces, stores of napalm were destroyed en masse to keep it from falling into enemy hands. It was only through a stroke of incredible luck that a Soviet spy embedded in the RAF was able to smuggle the material out. It was handed off to researchers in the Soviet Union and reverse engineered into what it is today.

Still in the experimental phase and freshly produced, Soviet leadership is searching for effective means of deploying the weapon. The Luftwaffe's ownership of the air makes copying the RAF's bombs less than ideal; instead, they turn to their infantrymen. The Napalm Grenade is a flexible, deceptively powerful device. Unlike other area denial incendiary weapons, napalm's unique makeup makes it useful even in wet or rainy environments, or when the enemy has access to wells or rivers for fire control duty. 
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