▁pre lim inary ▁terms ▁agreed ▁at ▁Id elf onso ▁and ▁created ▁the ▁short - l ived ▁Kingdom ▁of ▁E tr uria ▁for ▁Maria ▁Lu isa ' s ▁son - in - law ▁Louis . ▁ ▁The ▁Tre aty ▁has ▁tradition ally ▁been ▁seen ▁as ▁extremely ▁one - s ided ▁in ▁favour ▁of ▁France , ▁but ▁modern ▁histor ians ▁are ▁less ▁critical . ▁In ▁reality , ▁Spain ▁exerc ised ▁effective ▁control ▁only ▁over ▁a ▁small ▁part ▁of ▁the ▁territory ▁included ▁in ▁the ▁ 1 8 0 3 ▁Louisiana ▁P urchase ▁while ▁an ▁attempt ▁to ▁control ▁US ▁expansion ▁into ▁Spanish ▁territ ories ▁by ▁the ▁ 1 7 9 5 ▁Pin ck ney ' s ▁Tre aty ▁proved ▁in effect ive . ▁Spain ' s ▁Chief ▁Minister ▁Manuel ▁God oy ▁saw ▁dispos al ▁as ▁a ▁necessity , ▁later ▁just ifying ▁it ▁at ▁length ▁in ▁his ▁Mem oir s . ▁ ▁From ▁ 1 7 9 8 – 1 8 0 0 , ▁France ▁and ▁the ▁US ▁w aged ▁an ▁und ec la red ▁war ▁at ▁sea , ▁the ▁so - called ▁Qu asi - W ar , ▁which ▁was ▁ended ▁by ▁the ▁Convention ▁of ▁ 1 8 0 0 ▁or ▁Tre aty ▁of ▁Mor te font aine . ▁The ▁US ▁viewed ▁French ▁amb itions ▁in ▁North ▁America ▁with ▁great ▁concern , ▁since ▁with ▁British ▁Canada ▁to ▁the ▁north , ▁they ▁wanted ▁to ▁avoid ▁an ▁ag gress ive ▁and ▁powerful ▁France ▁replacing ▁Spain ▁in ▁the ▁south . ▁For ▁commercial ▁reasons , ▁Napoleon ▁wanted ▁to ▁re - est