From 6:48 on of this video someone can get a....naturally totally baseless....idea of what said.
Sorry ...didn't get your point .
Ok i will try to be more explicit :
See with attention the last part of the video i have pointed out (in particular from 6:57 on). Memorized ? Well.
Now image for some second to be the enemy. Ok ?
You must plan and prepare the position of your : mine fields, bunkers, ambushing anti-tank squads, air defense assets, MBTs, IFV, APCs, C4 vehicles and theirs entire...and very frail...logistical tail (maintenance vehicles, fuel vehicles , ammunition charts , engineering support etc..etc..) ,ok ?
Now if your opponent is equipped with a classical IFV (let put a Striker or a Puma IFV ) you can plan easily the best position and pathway for your LAVs, MBTs, APCs ,both on the offense and in defense, the times for redeployment or counterattack enemy forces in a particular sector and the most efficient placement for any of your defensive assets knowing that vectors of attacks are self-channeled by bridges - for any sector including a river - solid terrain - for any sectors with lakes, marass or swamps- or by the same coast - for any sector with sea coast-.
In substance the mere absence of a real amphibious capabilities among IFVs of your opponent mean that you can gain easily local force concentration , organize very easily choke points and ambush ,both in offensive and in defensive operations, with your MBTs, IFVs, CAS aircraft ,anti-tanks squads etc.... or force them in minefields or pre-planned "kill-box" area of your Artillery/Air Force.
Now if you add amphibious capability to all the vehicles of your enemy you will quickly realize that ,both in the offense and in the defense, your forces became effectively diluted over a territorial surface several orders of magnitude greater -your local force concentration effectively collapse- that several offensive/defensive tactics and solutions become totally impracticable and that the possible gaps opened on your frail rear assets and your entire logistical assets become suddenly not coverable
Clear the concept now Sujoy ?
Impact of this mobility feature on the same outcome of a conflcit against a very strong opponent is simply critical.