The Devotion of Verona to Venice was a feudal oath of loyalty made by Verona

Verona

Verona ; German Bern, Dietrichsbern or Welschbern) is a city in the Veneto, northern Italy, with approx. 265,000 inhabitants and one of the seven chef-lieus of the region. It is the second largest city municipality in the region and the third of North-Eastern Italy. The metropolitan area of Verona...

 to Venice

Republic of Venice

The Republic of Venice or Venetian Republic was a state originating from the city of Venice in Northeastern Italy. It existed for over a millennium, from the late 7th century until 1797. It was formally known as the Most Serene Republic of Venice and is often referred to as La Serenissima, in...

, via Veronese ambassadors to Venice, pronounced on June 24 1405. The devotion came after the conquest of the town by Venetian troops: Venice profited from internal ill-will in Verona against the Carraresi

Carraresi family

The Carraresi were an important family of northern Italy in the period 12th-15th centuries. As signori of Padua, their overwhelming power and patronage placed them in an isolated position far outshining any other single family...

(and from riots in the town), allowing its army in, helped in part by the people, and forcing the Carrara to flee.