▁this ▁move , ▁he ▁effectively ▁joined ▁Hash iba ▁H ide y oshi ' s ▁side , ▁which ▁opposed ▁the ▁Tok ug awa - H ō j ō ▁al liance . ▁ ▁Month s ▁later , ▁Tok ug awa ▁forces ▁inv aded ▁San ada ▁cl an ' s ▁territory ▁in ▁northern ▁Shin ano ▁province ▁with ▁ 7 , 0 0 0 ▁men ▁and ▁laid ▁sie ge ▁to ▁U eda ▁Castle , ▁which ▁was ▁def ended ▁by ▁only ▁ 1 , 2 0 0 ▁soldiers . ▁However , ▁Mas ay uki ▁was ▁able ▁to ▁inf lict ▁ 1 , 3 0 0 ▁cas ual ties ▁on ▁Tok ug awa ' s ▁side ▁and ▁won ▁a ▁decis ive ▁victory . ▁Meanwhile , ▁H ō j ō ▁U j ina o ▁attacked ▁Num ata ▁Castle , ▁but ▁was ▁also ▁re buff ed ▁by ▁San ada ▁forces . ▁This ▁was ▁the ▁First ▁Battle ▁of ▁U eda ▁Castle , ▁a ▁victory ▁that ▁earned ▁Mas ay uki ▁national ▁prom in ence . ▁Following ▁this , ▁Mas ay uki ▁went ▁from ▁being ▁just ▁a ▁former ▁Tak eda ▁retain er ▁to ▁become ▁recognized ▁as ▁an ▁independent ▁da im y ō . ▁ ▁Under ▁Toy ot omi ▁regime ▁ ▁Following ▁his ▁victory ▁over ▁the ▁Tok ug awa ▁cl an , ▁Mas ay uki ▁became ▁a ▁v ass al ▁to ▁Toy ot omi ▁H ide y oshi . ▁In ▁doing ▁so , ▁he ▁sent ▁his ▁son ▁Nob ush ige ▁( at ▁the ▁time ▁a ▁host age ▁to ▁U es ug i ▁cl an )