The Dallas Cowboys were founded in 1960 as the first modern NFL expansion team. It took the franchise seven seasons to put together a team with a winning record, but it has made up for it since then.
The Cowboys hold the NFL's all-time best winning percentage at .574 and have the most playoff appearances with 33. They are also the only franchise in NFL history to be valued at more than $5 billion.
Source: Athlon Sports & Life –
Read the full article here: 10 Greatest Dallas Cowboys Teams of All Time