Overreaching - the cavalry regiment are the masters of maneouvre warfare within the combat team. The infantry close with and destroy and the cavalry supports that with superior firepower and superior tactical mobility for the ultimate goal of shock action. That said, types of regiments can have direct effects based on the different capabilites they bring.
A light cavalry per the new doctrine cant compete firepower wise in direct engagements at the front but they can enable the heavier guys by acting as sensors. Conducting recces, screens, flank security, things like that. FIND tasks. They can also be used to FIX. Ex: Guards. Even some lighter offensive ops like raids or spoiling attacks. Finally they can be used in rear areas to carry out the traditional TACSEC tasks recce regiments used to do. VCPs. Convoy escorts. RAS. Etc. Think light horse regiments in the age of horse cavalry. Lighter on armour and firepower. Heavier on sensing capability and mobility. This will be further enhanced with the planned proliferation of enablers to LCav units like drones, LMs, mortars and assault troopers.
Heavy cavalry is less about FIND and FIX (though they can do that through enabling ops like the advance to contact) and all about the STRIKE. Pretty self explanatory and wont insult your intelligence by getting into it. Tank go boom.
Medium cavalry kinda splits the difference between the two and currently does not exist within the types of equipment we have. Im thr shakiest here since it doesnt actually exist in our army outside of the book that was just rewritten. Think Div recce which specializes in the deep fight that can FIND and FIX but also STRIKE as necessary to attrite the enemy, disrupt C2 nodes, disrupt supply lines, trade space for time on the delay, etc. Tracked. Heavy autocannon. Missiles. Decent armour. Lots of enablers like the LCav but heavier. Think Bradley squadrons as a modern example.
Dont worry - the image and my musings are open sourced. I dont want to get too deep into specifics but thats kind of an overview. An example of the continuum of cav tasks. Bear in mind its not absolute. A tank can conduct a GUARD task. A LCav AFV can conduct a BLOCK against lightly armed enemy. But I dont want to get too deep into the what-ifs.
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