No - it would take France a few months to reach Madrid as per Napoleon. At which point Spain withdraws from the alliance with Britain. At best Spain loses some of its gains (Gibraltar and/or Minorca) to France, at worst Charles IV gets installed as a French puppet
Britain has NO troops to spare at all. They were hiring Hessians to fight the Americans
No, France would never have conquested Spain... It was impossible for Charlemagne and It was impossible for Napoleon... to think that Louis XVI had the power to conquest Spain in 1777 It is an assumption not based on fact.
1778 to 1808: 30 years...Well, from 1808 to 1814 the Peninsular War took place... a total War... in six years about 800.000 Imperial soldiers fought in Spain (The summit in 1810-1811: about 400.000 soldiers), exactly from October 19, 1807 to April 30, 1813: 759.753 imperial soldiers were carried to Spain. and they achieved nothing... nothing... The Spanish Hell swallowed the invaders... the country opposed to hundreds thousands soldiers from the best troops of the Empire: awesome Grenadiers of the Imperial Guard; light Voltigeurs, German, italian, Swiss, Polish infantry and cavalry...dragoons, hussars ...Gendarmes...artillery, engineers, mamluks...
And what did they win? as Clauzel wrote: "everything is lost in Spain" (Letter from Clauzel to Abbé, April, 13, 1813). If you like I can write what it was written by king Joseph, Jourdan, Massena, Marmont, Jomini, Lemière, Bigarré, Rocca, Foy...etc etc etc.
So, if It was impossible to Napoleon (and his soldiers) conquered Spain ..What basis do you say that Louis XVI would have conquered Spain in 6 months?
No, in 1777 France would never have conquered Spain...
Have you got any proof? the "feeble" Spanish army defeated british and austrian ...in XVIII centuryfacing the feeble Spanish Army
at worst Charles IV gets installed as a French puppet
Spanish people would never have accepted a foreing puppet in Spain...you should read Napoleon and his brother Joseph ... to see if the Spaniards tolerated a puppet or they prefered a total war against the puppet.
By the way... Napoleon also brought Hessians... and nothing changed.