to support BFT's point, you were insulting when you claimed i didn't know what "or" means. It's just that you are using it wrong. The french didn't reinforce england in the HYW (early example of game war), the Indians (India) didn't reinforce the troops of Portugal, England, or any other foreign conquerors while they were conquering them (mid game mechanics), and the Russians were not filling the ranks of Napolean's troops. It was not an OR thing in most wars in most time frames of this game. Occasionally countries would have regiments of local troops, but this mechanic is reflected by the mercenary feature.
Mea culpa.
The English didn't use Indians? That's news. How bout the Spanish in mesoamerica? The Iberians in Morocco? Napoleon got wrecked, but he was at the end of the timeline and he was going through extreme winter in
scorched earth conditions: his example is the exception that proves the rule, with respect to the relative unimportance of supply lines in the EU4 era.
Already addressed the merc thing. The game explicitly disallows merc recruitment on foreign continents, and they're way too expensive to simulate the kind of organic low-cost overseas recruitment that actually happened in history.
The point is that yes, you can make realism arguments all over the place, but the reality was so complex that there's a solid chance you'll make things less historical in the final analysis if you fixate on any one facet of warfare in the EU4 era. Forcing people to hire mercs in Europe to transport over to South America instead of letting them reinforce naturally overseas is a perfect example of a potential fix that sounds right on its face, but would be utterly pointless and arguably deleterious in practice, because it would ignore all of the ways that that real Europeans not only reinforced, but
grew in fighting strength as they went through the New World.
Then there's all the stuff I just wrote, and you just glossed over, about the realistic toll of attrition and combat versus the toll of both in EU4. Then there's the fact that this entire discussion started in reference to
supply lines, but somewhere along the way you two fixated on
reinforcement by itself. But you can't divorce those two issues: reinforcements would have been generally less important in foreign territory than they are in EU4
precisely because supply lines weren't important, and thus the only real way you were gonna lose significant amounts of troops (barring extreme conditions) is through battle. And as I pointed out, there were fewer battles per war in history than there are in EU4.
All of this stuff is interrelated. And like it or not, the current abstracted system does a pretty decent job.
EDIT: moderated my tone. Saw your edit, Steve. Fair enough and no worries.